projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
iwlwifi: Beautify by removing superfluous newlines and code
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl4965-base.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 /*
31 * NOTE: This file (iwl-base.c) is used to build to multiple hardware targets
32 * by defining IWL to either 3945 or 4965. The Makefile used when building
33 * the base targets will create base-3945.o and base-4965.o
34 *
35 * The eventual goal is to move as many of the #if IWL / #endif blocks out of
36 * this file and into the hardware specific implementation files (iwl-XXXX.c)
37 * and leave only the common (non #ifdef sprinkled) code in this file
38 */
39
40 #include <linux/kernel.h>
41 #include <linux/module.h>
42 #include <linux/version.h>
43 #include <linux/init.h>
44 #include <linux/pci.h>
45 #include <linux/dma-mapping.h>
46 #include <linux/delay.h>
47 #include <linux/skbuff.h>
48 #include <linux/netdevice.h>
49 #include <linux/wireless.h>
50 #include <linux/firmware.h>
51 #include <linux/etherdevice.h>
52 #include <linux/if_arp.h>
53
54 #include <net/ieee80211_radiotap.h>
55 #include <net/mac80211.h>
56
57 #include <asm/div64.h>
58
59 #define IWL 4965
60
61 #include "iwlwifi.h"
62 #include "iwl-4965.h"
63 #include "iwl-helpers.h"
64
65 #ifdef CONFIG_IWLWIFI_DEBUG
66 u32 iwl_debug_level;
67 #endif
68
69 /******************************************************************************
70 *
71 * module boiler plate
72 *
73 ******************************************************************************/
74
75 /* module parameters */
76 int iwl_param_disable_hw_scan;
77 int iwl_param_debug;
78 int iwl_param_disable; /* def: enable radio */
79 int iwl_param_antenna; /* def: 0 = both antennas (use diversity) */
80 int iwl_param_hwcrypto; /* def: using software encryption */
81 int iwl_param_qos_enable = 1;
82 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
83
84 /*
85 * module name, copyright, version, etc.
86 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
87 */
88
89 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
90
91 #ifdef CONFIG_IWLWIFI_DEBUG
92 #define VD "d"
93 #else
94 #define VD
95 #endif
96
97 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
98 #define VS "s"
99 #else
100 #define VS
101 #endif
102
103 #define IWLWIFI_VERSION "1.1.17k" VD VS
104 #define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation"
105 #define DRV_VERSION IWLWIFI_VERSION
106
107 /* Change firmware file name, using "-" and incrementing number,
108 * *only* when uCode interface or architecture changes so that it
109 * is not compatible with earlier drivers.
110 * This number will also appear in << 8 position of 1st dword of uCode file */
111 #define IWL4965_UCODE_API "-1"
112
113 MODULE_DESCRIPTION(DRV_DESCRIPTION);
114 MODULE_VERSION(DRV_VERSION);
115 MODULE_AUTHOR(DRV_COPYRIGHT);
116 MODULE_LICENSE("GPL");
117
118 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
119 {
120 u16 fc = le16_to_cpu(hdr->frame_control);
121 int hdr_len = ieee80211_get_hdrlen(fc);
122
123 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
124 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
125 return NULL;
126 }
127
128 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
129 struct iwl_priv *priv, int mode)
130 {
131 int i;
132
133 for (i = 0; i < 3; i++)
134 if (priv->modes[i].mode == mode)
135 return &priv->modes[i];
136
137 return NULL;
138 }
139
140 static int iwl_is_empty_essid(const char *essid, int essid_len)
141 {
142 /* Single white space is for Linksys APs */
143 if (essid_len == 1 && essid[0] == ' ')
144 return 1;
145
146 /* Otherwise, if the entire essid is 0, we assume it is hidden */
147 while (essid_len) {
148 essid_len--;
149 if (essid[essid_len] != '\0')
150 return 0;
151 }
152
153 return 1;
154 }
155
156 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
157 {
158 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
159 const char *s = essid;
160 char *d = escaped;
161
162 if (iwl_is_empty_essid(essid, essid_len)) {
163 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
164 return escaped;
165 }
166
167 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
168 while (essid_len--) {
169 if (*s == '\0') {
170 *d++ = '\\';
171 *d++ = '0';
172 s++;
173 } else
174 *d++ = *s++;
175 }
176 *d = '\0';
177 return escaped;
178 }
179
180 static void iwl_print_hex_dump(int level, void *p, u32 len)
181 {
182 #ifdef CONFIG_IWLWIFI_DEBUG
183 if (!(iwl_debug_level & level))
184 return;
185
186 print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
187 p, len, 1);
188 #endif
189 }
190
191 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
192 * DMA services
193 *
194 * Theory of operation
195 *
196 * A queue is a circular buffers with 'Read' and 'Write' pointers.
197 * 2 empty entries always kept in the buffer to protect from overflow.
198 *
199 * For Tx queue, there are low mark and high mark limits. If, after queuing
200 * the packet for Tx, free space become < low mark, Tx queue stopped. When
201 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
202 * Tx queue resumed.
203 *
204 * The IWL operates with six queues, one receive queue in the device's
205 * sram, one transmit queue for sending commands to the device firmware,
206 * and four transmit queues for data.
207 ***************************************************/
208
209 static int iwl_queue_space(const struct iwl_queue *q)
210 {
211 int s = q->read_ptr - q->write_ptr;
212
213 if (q->read_ptr > q->write_ptr)
214 s -= q->n_bd;
215
216 if (s <= 0)
217 s += q->n_window;
218 /* keep some reserve to not confuse empty and full situations */
219 s -= 2;
220 if (s < 0)
221 s = 0;
222 return s;
223 }
224
225 /* XXX: n_bd must be power-of-two size */
226 static inline int iwl_queue_inc_wrap(int index, int n_bd)
227 {
228 return ++index & (n_bd - 1);
229 }
230
231 /* XXX: n_bd must be power-of-two size */
232 static inline int iwl_queue_dec_wrap(int index, int n_bd)
233 {
234 return --index & (n_bd - 1);
235 }
236
237 static inline int x2_queue_used(const struct iwl_queue *q, int i)
238 {
239 return q->write_ptr > q->read_ptr ?
240 (i >= q->read_ptr && i < q->write_ptr) :
241 !(i < q->read_ptr && i >= q->write_ptr);
242 }
243
244 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
245 {
246 if (is_huge)
247 return q->n_window;
248
249 return index & (q->n_window - 1);
250 }
251
252 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
253 int count, int slots_num, u32 id)
254 {
255 q->n_bd = count;
256 q->n_window = slots_num;
257 q->id = id;
258
259 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
260 * and iwl_queue_dec_wrap are broken. */
261 BUG_ON(!is_power_of_2(count));
262
263 /* slots_num must be power-of-two size, otherwise
264 * get_cmd_index is broken. */
265 BUG_ON(!is_power_of_2(slots_num));
266
267 q->low_mark = q->n_window / 4;
268 if (q->low_mark < 4)
269 q->low_mark = 4;
270
271 q->high_mark = q->n_window / 8;
272 if (q->high_mark < 2)
273 q->high_mark = 2;
274
275 q->write_ptr = q->read_ptr = 0;
276
277 return 0;
278 }
279
280 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
281 struct iwl_tx_queue *txq, u32 id)
282 {
283 struct pci_dev *dev = priv->pci_dev;
284
285 if (id != IWL_CMD_QUEUE_NUM) {
286 txq->txb = kmalloc(sizeof(txq->txb[0]) *
287 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
288 if (!txq->txb) {
289 IWL_ERROR("kmalloc for auxiliary BD "
290 "structures failed\n");
291 goto error;
292 }
293 } else
294 txq->txb = NULL;
295
296 txq->bd = pci_alloc_consistent(dev,
297 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
298 &txq->q.dma_addr);
299
300 if (!txq->bd) {
301 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
302 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
303 goto error;
304 }
305 txq->q.id = id;
306
307 return 0;
308
309 error:
310 if (txq->txb) {
311 kfree(txq->txb);
312 txq->txb = NULL;
313 }
314
315 return -ENOMEM;
316 }
317
318 int iwl_tx_queue_init(struct iwl_priv *priv,
319 struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
320 {
321 struct pci_dev *dev = priv->pci_dev;
322 int len;
323 int rc = 0;
324
325 /* allocate command space + one big command for scan since scan
326 * command is very huge the system will not have two scan at the
327 * same time */
328 len = sizeof(struct iwl_cmd) * slots_num;
329 if (txq_id == IWL_CMD_QUEUE_NUM)
330 len += IWL_MAX_SCAN_SIZE;
331 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
332 if (!txq->cmd)
333 return -ENOMEM;
334
335 rc = iwl_tx_queue_alloc(priv, txq, txq_id);
336 if (rc) {
337 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
338
339 return -ENOMEM;
340 }
341 txq->need_update = 0;
342
343 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
344 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
345 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
346 iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
347
348 iwl_hw_tx_queue_init(priv, txq);
349
350 return 0;
351 }
352
353 /**
354 * iwl_tx_queue_free - Deallocate DMA queue.
355 * @txq: Transmit queue to deallocate.
356 *
357 * Empty queue by removing and destroying all BD's.
358 * Free all buffers. txq itself is not freed.
359 *
360 */
361 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
362 {
363 struct iwl_queue *q = &txq->q;
364 struct pci_dev *dev = priv->pci_dev;
365 int len;
366
367 if (q->n_bd == 0)
368 return;
369
370 /* first, empty all BD's */
371 for (; q->write_ptr != q->read_ptr;
372 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
373 iwl_hw_txq_free_tfd(priv, txq);
374
375 len = sizeof(struct iwl_cmd) * q->n_window;
376 if (q->id == IWL_CMD_QUEUE_NUM)
377 len += IWL_MAX_SCAN_SIZE;
378
379 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
380
381 /* free buffers belonging to queue itself */
382 if (txq->q.n_bd)
383 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
384 txq->q.n_bd, txq->bd, txq->q.dma_addr);
385
386 if (txq->txb) {
387 kfree(txq->txb);
388 txq->txb = NULL;
389 }
390
391 /* 0 fill whole structure */
392 memset(txq, 0, sizeof(*txq));
393 }
394
395 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
396
397 /*************** STATION TABLE MANAGEMENT ****
398 *
399 * NOTE: This needs to be overhauled to better synchronize between
400 * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
401 *
402 * mac80211 should also be examined to determine if sta_info is duplicating
403 * the functionality provided here
404 */
405
406 /**************************************************************/
407
408 #if 0 /* temporary disable till we add real remove station */
409 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
410 {
411 int index = IWL_INVALID_STATION;
412 int i;
413 unsigned long flags;
414
415 spin_lock_irqsave(&priv->sta_lock, flags);
416
417 if (is_ap)
418 index = IWL_AP_ID;
419 else if (is_broadcast_ether_addr(addr))
420 index = priv->hw_setting.bcast_sta_id;
421 else
422 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
423 if (priv->stations[i].used &&
424 !compare_ether_addr(priv->stations[i].sta.sta.addr,
425 addr)) {
426 index = i;
427 break;
428 }
429
430 if (unlikely(index == IWL_INVALID_STATION))
431 goto out;
432
433 if (priv->stations[index].used) {
434 priv->stations[index].used = 0;
435 priv->num_stations--;
436 }
437
438 BUG_ON(priv->num_stations < 0);
439
440 out:
441 spin_unlock_irqrestore(&priv->sta_lock, flags);
442 return 0;
443 }
444 #endif
445
446 static void iwl_clear_stations_table(struct iwl_priv *priv)
447 {
448 unsigned long flags;
449
450 spin_lock_irqsave(&priv->sta_lock, flags);
451
452 priv->num_stations = 0;
453 memset(priv->stations, 0, sizeof(priv->stations));
454
455 spin_unlock_irqrestore(&priv->sta_lock, flags);
456 }
457
458 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
459 {
460 int i;
461 int index = IWL_INVALID_STATION;
462 struct iwl_station_entry *station;
463 unsigned long flags_spin;
464 DECLARE_MAC_BUF(mac);
465
466 spin_lock_irqsave(&priv->sta_lock, flags_spin);
467 if (is_ap)
468 index = IWL_AP_ID;
469 else if (is_broadcast_ether_addr(addr))
470 index = priv->hw_setting.bcast_sta_id;
471 else
472 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
473 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
474 addr)) {
475 index = i;
476 break;
477 }
478
479 if (!priv->stations[i].used &&
480 index == IWL_INVALID_STATION)
481 index = i;
482 }
483
484
485 /* These two conditions has the same outcome but keep them separate
486 since they have different meaning */
487 if (unlikely(index == IWL_INVALID_STATION)) {
488 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
489 return index;
490 }
491
492 if (priv->stations[index].used &&
493 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
494 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
495 return index;
496 }
497
498
499 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
500 station = &priv->stations[index];
501 station->used = 1;
502 priv->num_stations++;
503
504 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
505 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
506 station->sta.mode = 0;
507 station->sta.sta.sta_id = index;
508 station->sta.station_flags = 0;
509
510 #ifdef CONFIG_IWLWIFI_HT
511 /* BCAST station and IBSS stations do not work in HT mode */
512 if (index != priv->hw_setting.bcast_sta_id &&
513 priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
514 iwl4965_set_ht_add_station(priv, index);
515 #endif /*CONFIG_IWLWIFI_HT*/
516
517 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
518 iwl_send_add_station(priv, &station->sta, flags);
519 return index;
520
521 }
522
523 /*************** DRIVER STATUS FUNCTIONS *****/
524
525 static inline int iwl_is_ready(struct iwl_priv *priv)
526 {
527 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
528 * set but EXIT_PENDING is not */
529 return test_bit(STATUS_READY, &priv->status) &&
530 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
531 !test_bit(STATUS_EXIT_PENDING, &priv->status);
532 }
533
534 static inline int iwl_is_alive(struct iwl_priv *priv)
535 {
536 return test_bit(STATUS_ALIVE, &priv->status);
537 }
538
539 static inline int iwl_is_init(struct iwl_priv *priv)
540 {
541 return test_bit(STATUS_INIT, &priv->status);
542 }
543
544 static inline int iwl_is_rfkill(struct iwl_priv *priv)
545 {
546 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
547 test_bit(STATUS_RF_KILL_SW, &priv->status);
548 }
549
550 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
551 {
552
553 if (iwl_is_rfkill(priv))
554 return 0;
555
556 return iwl_is_ready(priv);
557 }
558
559 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
560
561 #define IWL_CMD(x) case x : return #x
562
563 static const char *get_cmd_string(u8 cmd)
564 {
565 switch (cmd) {
566 IWL_CMD(REPLY_ALIVE);
567 IWL_CMD(REPLY_ERROR);
568 IWL_CMD(REPLY_RXON);
569 IWL_CMD(REPLY_RXON_ASSOC);
570 IWL_CMD(REPLY_QOS_PARAM);
571 IWL_CMD(REPLY_RXON_TIMING);
572 IWL_CMD(REPLY_ADD_STA);
573 IWL_CMD(REPLY_REMOVE_STA);
574 IWL_CMD(REPLY_REMOVE_ALL_STA);
575 IWL_CMD(REPLY_TX);
576 IWL_CMD(REPLY_RATE_SCALE);
577 IWL_CMD(REPLY_LEDS_CMD);
578 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
579 IWL_CMD(RADAR_NOTIFICATION);
580 IWL_CMD(REPLY_QUIET_CMD);
581 IWL_CMD(REPLY_CHANNEL_SWITCH);
582 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
583 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
584 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
585 IWL_CMD(POWER_TABLE_CMD);
586 IWL_CMD(PM_SLEEP_NOTIFICATION);
587 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
588 IWL_CMD(REPLY_SCAN_CMD);
589 IWL_CMD(REPLY_SCAN_ABORT_CMD);
590 IWL_CMD(SCAN_START_NOTIFICATION);
591 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
592 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
593 IWL_CMD(BEACON_NOTIFICATION);
594 IWL_CMD(REPLY_TX_BEACON);
595 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
596 IWL_CMD(QUIET_NOTIFICATION);
597 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
598 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
599 IWL_CMD(REPLY_BT_CONFIG);
600 IWL_CMD(REPLY_STATISTICS_CMD);
601 IWL_CMD(STATISTICS_NOTIFICATION);
602 IWL_CMD(REPLY_CARD_STATE_CMD);
603 IWL_CMD(CARD_STATE_NOTIFICATION);
604 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
605 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
606 IWL_CMD(SENSITIVITY_CMD);
607 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
608 IWL_CMD(REPLY_RX_PHY_CMD);
609 IWL_CMD(REPLY_RX_MPDU_CMD);
610 IWL_CMD(REPLY_4965_RX);
611 IWL_CMD(REPLY_COMPRESSED_BA);
612 default:
613 return "UNKNOWN";
614
615 }
616 }
617
618 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
619
620 /**
621 * iwl_enqueue_hcmd - enqueue a uCode command
622 * @priv: device private data point
623 * @cmd: a point to the ucode command structure
624 *
625 * The function returns < 0 values to indicate the operation is
626 * failed. On success, it turns the index (> 0) of command in the
627 * command queue.
628 */
629 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
630 {
631 struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
632 struct iwl_queue *q = &txq->q;
633 struct iwl_tfd_frame *tfd;
634 u32 *control_flags;
635 struct iwl_cmd *out_cmd;
636 u32 idx;
637 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
638 dma_addr_t phys_addr;
639 int ret;
640 unsigned long flags;
641
642 /* If any of the command structures end up being larger than
643 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
644 * we will need to increase the size of the TFD entries */
645 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
646 !(cmd->meta.flags & CMD_SIZE_HUGE));
647
648 if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
649 IWL_ERROR("No space for Tx\n");
650 return -ENOSPC;
651 }
652
653 spin_lock_irqsave(&priv->hcmd_lock, flags);
654
655 tfd = &txq->bd[q->write_ptr];
656 memset(tfd, 0, sizeof(*tfd));
657
658 control_flags = (u32 *) tfd;
659
660 idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
661 out_cmd = &txq->cmd[idx];
662
663 out_cmd->hdr.cmd = cmd->id;
664 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
665 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
666
667 /* At this point, the out_cmd now has all of the incoming cmd
668 * information */
669
670 out_cmd->hdr.flags = 0;
671 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
672 INDEX_TO_SEQ(q->write_ptr));
673 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
674 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
675
676 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
677 offsetof(struct iwl_cmd, hdr);
678 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
679
680 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
681 "%d bytes at %d[%d]:%d\n",
682 get_cmd_string(out_cmd->hdr.cmd),
683 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
684 fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
685
686 txq->need_update = 1;
687 ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
688 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
689 iwl_tx_queue_update_write_ptr(priv, txq);
690
691 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
692 return ret ? ret : idx;
693 }
694
695 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
696 {
697 int ret;
698
699 BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
700
701 /* An asynchronous command can not expect an SKB to be set. */
702 BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
703
704 /* An asynchronous command MUST have a callback. */
705 BUG_ON(!cmd->meta.u.callback);
706
707 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
708 return -EBUSY;
709
710 ret = iwl_enqueue_hcmd(priv, cmd);
711 if (ret < 0) {
712 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
713 get_cmd_string(cmd->id), ret);
714 return ret;
715 }
716 return 0;
717 }
718
719 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
720 {
721 int cmd_idx;
722 int ret;
723 static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
724
725 BUG_ON(cmd->meta.flags & CMD_ASYNC);
726
727 /* A synchronous command can not have a callback set. */
728 BUG_ON(cmd->meta.u.callback != NULL);
729
730 if (atomic_xchg(&entry, 1)) {
731 IWL_ERROR("Error sending %s: Already sending a host command\n",
732 get_cmd_string(cmd->id));
733 return -EBUSY;
734 }
735
736 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
737
738 if (cmd->meta.flags & CMD_WANT_SKB)
739 cmd->meta.source = &cmd->meta;
740
741 cmd_idx = iwl_enqueue_hcmd(priv, cmd);
742 if (cmd_idx < 0) {
743 ret = cmd_idx;
744 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
745 get_cmd_string(cmd->id), ret);
746 goto out;
747 }
748
749 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
750 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
751 HOST_COMPLETE_TIMEOUT);
752 if (!ret) {
753 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
754 IWL_ERROR("Error sending %s: time out after %dms.\n",
755 get_cmd_string(cmd->id),
756 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
757
758 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
759 ret = -ETIMEDOUT;
760 goto cancel;
761 }
762 }
763
764 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
765 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
766 get_cmd_string(cmd->id));
767 ret = -ECANCELED;
768 goto fail;
769 }
770 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
771 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
772 get_cmd_string(cmd->id));
773 ret = -EIO;
774 goto fail;
775 }
776 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
777 IWL_ERROR("Error: Response NULL in '%s'\n",
778 get_cmd_string(cmd->id));
779 ret = -EIO;
780 goto out;
781 }
782
783 ret = 0;
784 goto out;
785
786 cancel:
787 if (cmd->meta.flags & CMD_WANT_SKB) {
788 struct iwl_cmd *qcmd;
789
790 /* Cancel the CMD_WANT_SKB flag for the cmd in the
791 * TX cmd queue. Otherwise in case the cmd comes
792 * in later, it will possibly set an invalid
793 * address (cmd->meta.source). */
794 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
795 qcmd->meta.flags &= ~CMD_WANT_SKB;
796 }
797 fail:
798 if (cmd->meta.u.skb) {
799 dev_kfree_skb_any(cmd->meta.u.skb);
800 cmd->meta.u.skb = NULL;
801 }
802 out:
803 atomic_set(&entry, 0);
804 return ret;
805 }
806
807 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
808 {
809 /* A command can not be asynchronous AND expect an SKB to be set. */
810 BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
811 (cmd->meta.flags & CMD_WANT_SKB));
812
813 if (cmd->meta.flags & CMD_ASYNC)
814 return iwl_send_cmd_async(priv, cmd);
815
816 return iwl_send_cmd_sync(priv, cmd);
817 }
818
819 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
820 {
821 struct iwl_host_cmd cmd = {
822 .id = id,
823 .len = len,
824 .data = data,
825 };
826
827 return iwl_send_cmd_sync(priv, &cmd);
828 }
829
830 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
831 {
832 struct iwl_host_cmd cmd = {
833 .id = id,
834 .len = sizeof(val),
835 .data = &val,
836 };
837
838 return iwl_send_cmd_sync(priv, &cmd);
839 }
840
841 int iwl_send_statistics_request(struct iwl_priv *priv)
842 {
843 return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
844 }
845
846 /**
847 * iwl_rxon_add_station - add station into station table.
848 *
849 * there is only one AP station with id= IWL_AP_ID
850 * NOTE: mutex must be held before calling the this fnction
851 */
852 static int iwl_rxon_add_station(struct iwl_priv *priv,
853 const u8 *addr, int is_ap)
854 {
855 u8 sta_id;
856
857 sta_id = iwl_add_station(priv, addr, is_ap, 0);
858 iwl4965_add_station(priv, addr, is_ap);
859
860 return sta_id;
861 }
862
863 /**
864 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
865 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
866 * @channel: Any channel valid for the requested phymode
867
868 * In addition to setting the staging RXON, priv->phymode is also set.
869 *
870 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
871 * in the staging RXON flag structure based on the phymode
872 */
873 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
874 {
875 if (!iwl_get_channel_info(priv, phymode, channel)) {
876 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
877 channel, phymode);
878 return -EINVAL;
879 }
880
881 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
882 (priv->phymode == phymode))
883 return 0;
884
885 priv->staging_rxon.channel = cpu_to_le16(channel);
886 if (phymode == MODE_IEEE80211A)
887 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
888 else
889 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
890
891 priv->phymode = phymode;
892
893 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
894
895 return 0;
896 }
897
898 /**
899 * iwl_check_rxon_cmd - validate RXON structure is valid
900 *
901 * NOTE: This is really only useful during development and can eventually
902 * be #ifdef'd out once the driver is stable and folks aren't actively
903 * making changes
904 */
905 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
906 {
907 int error = 0;
908 int counter = 1;
909
910 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
911 error |= le32_to_cpu(rxon->flags &
912 (RXON_FLG_TGJ_NARROW_BAND_MSK |
913 RXON_FLG_RADAR_DETECT_MSK));
914 if (error)
915 IWL_WARNING("check 24G fields %d | %d\n",
916 counter++, error);
917 } else {
918 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
919 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
920 if (error)
921 IWL_WARNING("check 52 fields %d | %d\n",
922 counter++, error);
923 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
924 if (error)
925 IWL_WARNING("check 52 CCK %d | %d\n",
926 counter++, error);
927 }
928 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
929 if (error)
930 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
931
932 /* make sure basic rates 6Mbps and 1Mbps are supported */
933 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
934 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
935 if (error)
936 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
937
938 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
939 if (error)
940 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
941
942 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
943 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
944 if (error)
945 IWL_WARNING("check CCK and short slot %d | %d\n",
946 counter++, error);
947
948 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
949 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
950 if (error)
951 IWL_WARNING("check CCK & auto detect %d | %d\n",
952 counter++, error);
953
954 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
955 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
956 if (error)
957 IWL_WARNING("check TGG and auto detect %d | %d\n",
958 counter++, error);
959
960 if (error)
961 IWL_WARNING("Tuning to channel %d\n",
962 le16_to_cpu(rxon->channel));
963
964 if (error) {
965 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
966 return -1;
967 }
968 return 0;
969 }
970
971 /**
972 * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
973 * @priv: staging_rxon is compared to active_rxon
974 *
975 * If the RXON structure is changing sufficient to require a new
976 * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
977 * to indicate a new tune is required.
978 */
979 static int iwl_full_rxon_required(struct iwl_priv *priv)
980 {
981
982 /* These items are only settable from the full RXON command */
983 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
984 compare_ether_addr(priv->staging_rxon.bssid_addr,
985 priv->active_rxon.bssid_addr) ||
986 compare_ether_addr(priv->staging_rxon.node_addr,
987 priv->active_rxon.node_addr) ||
988 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
989 priv->active_rxon.wlap_bssid_addr) ||
990 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
991 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
992 (priv->staging_rxon.air_propagation !=
993 priv->active_rxon.air_propagation) ||
994 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
995 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
996 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
997 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
998 (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
999 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1000 return 1;
1001
1002 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1003 * be updated with the RXON_ASSOC command -- however only some
1004 * flag transitions are allowed using RXON_ASSOC */
1005
1006 /* Check if we are not switching bands */
1007 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1008 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1009 return 1;
1010
1011 /* Check if we are switching association toggle */
1012 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1013 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1014 return 1;
1015
1016 return 0;
1017 }
1018
1019 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1020 {
1021 int rc = 0;
1022 struct iwl_rx_packet *res = NULL;
1023 struct iwl_rxon_assoc_cmd rxon_assoc;
1024 struct iwl_host_cmd cmd = {
1025 .id = REPLY_RXON_ASSOC,
1026 .len = sizeof(rxon_assoc),
1027 .meta.flags = CMD_WANT_SKB,
1028 .data = &rxon_assoc,
1029 };
1030 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1031 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1032
1033 if ((rxon1->flags == rxon2->flags) &&
1034 (rxon1->filter_flags == rxon2->filter_flags) &&
1035 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1036 (rxon1->ofdm_ht_single_stream_basic_rates ==
1037 rxon2->ofdm_ht_single_stream_basic_rates) &&
1038 (rxon1->ofdm_ht_dual_stream_basic_rates ==
1039 rxon2->ofdm_ht_dual_stream_basic_rates) &&
1040 (rxon1->rx_chain == rxon2->rx_chain) &&
1041 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1042 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1043 return 0;
1044 }
1045
1046 rxon_assoc.flags = priv->staging_rxon.flags;
1047 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1048 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1049 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1050 rxon_assoc.reserved = 0;
1051 rxon_assoc.ofdm_ht_single_stream_basic_rates =
1052 priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1053 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1054 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1055 rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1056
1057 rc = iwl_send_cmd_sync(priv, &cmd);
1058 if (rc)
1059 return rc;
1060
1061 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1062 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1063 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1064 rc = -EIO;
1065 }
1066
1067 priv->alloc_rxb_skb--;
1068 dev_kfree_skb_any(cmd.meta.u.skb);
1069
1070 return rc;
1071 }
1072
1073 /**
1074 * iwl_commit_rxon - commit staging_rxon to hardware
1075 *
1076 * The RXON command in staging_rxon is committed to the hardware and
1077 * the active_rxon structure is updated with the new data. This
1078 * function correctly transitions out of the RXON_ASSOC_MSK state if
1079 * a HW tune is required based on the RXON structure changes.
1080 */
1081 static int iwl_commit_rxon(struct iwl_priv *priv)
1082 {
1083 /* cast away the const for active_rxon in this function */
1084 struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1085 DECLARE_MAC_BUF(mac);
1086 int rc = 0;
1087
1088 if (!iwl_is_alive(priv))
1089 return -1;
1090
1091 /* always get timestamp with Rx frame */
1092 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1093
1094 rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1095 if (rc) {
1096 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
1097 return -EINVAL;
1098 }
1099
1100 /* If we don't need to send a full RXON, we can use
1101 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1102 * and other flags for the current radio configuration. */
1103 if (!iwl_full_rxon_required(priv)) {
1104 rc = iwl_send_rxon_assoc(priv);
1105 if (rc) {
1106 IWL_ERROR("Error setting RXON_ASSOC "
1107 "configuration (%d).\n", rc);
1108 return rc;
1109 }
1110
1111 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1112
1113 return 0;
1114 }
1115
1116 /* station table will be cleared */
1117 priv->assoc_station_added = 0;
1118
1119 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1120 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1121 if (!priv->error_recovering)
1122 priv->start_calib = 0;
1123
1124 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1125 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1126
1127 /* If we are currently associated and the new config requires
1128 * an RXON_ASSOC and the new config wants the associated mask enabled,
1129 * we must clear the associated from the active configuration
1130 * before we apply the new config */
1131 if (iwl_is_associated(priv) &&
1132 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1133 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1134 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1135
1136 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1137 sizeof(struct iwl_rxon_cmd),
1138 &priv->active_rxon);
1139
1140 /* If the mask clearing failed then we set
1141 * active_rxon back to what it was previously */
1142 if (rc) {
1143 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1144 IWL_ERROR("Error clearing ASSOC_MSK on current "
1145 "configuration (%d).\n", rc);
1146 return rc;
1147 }
1148 }
1149
1150 IWL_DEBUG_INFO("Sending RXON\n"
1151 "* with%s RXON_FILTER_ASSOC_MSK\n"
1152 "* channel = %d\n"
1153 "* bssid = %s\n",
1154 ((priv->staging_rxon.filter_flags &
1155 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1156 le16_to_cpu(priv->staging_rxon.channel),
1157 print_mac(mac, priv->staging_rxon.bssid_addr));
1158
1159 /* Apply the new configuration */
1160 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1161 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1162 if (rc) {
1163 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1164 return rc;
1165 }
1166
1167 iwl_clear_stations_table(priv);
1168
1169 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1170 if (!priv->error_recovering)
1171 priv->start_calib = 0;
1172
1173 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1174 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1175 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1176
1177 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1178
1179 /* If we issue a new RXON command which required a tune then we must
1180 * send a new TXPOWER command or we won't be able to Tx any frames */
1181 rc = iwl_hw_reg_send_txpower(priv);
1182 if (rc) {
1183 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1184 return rc;
1185 }
1186
1187 /* Add the broadcast address so we can send broadcast frames */
1188 if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
1189 IWL_INVALID_STATION) {
1190 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1191 return -EIO;
1192 }
1193
1194 /* If we have set the ASSOC_MSK and we are in BSS mode then
1195 * add the IWL_AP_ID to the station rate table */
1196 if (iwl_is_associated(priv) &&
1197 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1198 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1199 == IWL_INVALID_STATION) {
1200 IWL_ERROR("Error adding AP address for transmit.\n");
1201 return -EIO;
1202 }
1203 priv->assoc_station_added = 1;
1204 }
1205
1206 return 0;
1207 }
1208
1209 static int iwl_send_bt_config(struct iwl_priv *priv)
1210 {
1211 struct iwl_bt_cmd bt_cmd = {
1212 .flags = 3,
1213 .lead_time = 0xAA,
1214 .max_kill = 1,
1215 .kill_ack_mask = 0,
1216 .kill_cts_mask = 0,
1217 };
1218
1219 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1220 sizeof(struct iwl_bt_cmd), &bt_cmd);
1221 }
1222
1223 static int iwl_send_scan_abort(struct iwl_priv *priv)
1224 {
1225 int rc = 0;
1226 struct iwl_rx_packet *res;
1227 struct iwl_host_cmd cmd = {
1228 .id = REPLY_SCAN_ABORT_CMD,
1229 .meta.flags = CMD_WANT_SKB,
1230 };
1231
1232 /* If there isn't a scan actively going on in the hardware
1233 * then we are in between scan bands and not actually
1234 * actively scanning, so don't send the abort command */
1235 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1236 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1237 return 0;
1238 }
1239
1240 rc = iwl_send_cmd_sync(priv, &cmd);
1241 if (rc) {
1242 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1243 return rc;
1244 }
1245
1246 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1247 if (res->u.status != CAN_ABORT_STATUS) {
1248 /* The scan abort will return 1 for success or
1249 * 2 for "failure". A failure condition can be
1250 * due to simply not being in an active scan which
1251 * can occur if we send the scan abort before we
1252 * the microcode has notified us that a scan is
1253 * completed. */
1254 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1255 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1256 clear_bit(STATUS_SCAN_HW, &priv->status);
1257 }
1258
1259 dev_kfree_skb_any(cmd.meta.u.skb);
1260
1261 return rc;
1262 }
1263
1264 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1265 struct iwl_cmd *cmd,
1266 struct sk_buff *skb)
1267 {
1268 return 1;
1269 }
1270
1271 /*
1272 * CARD_STATE_CMD
1273 *
1274 * Use: Sets the internal card state to enable, disable, or halt
1275 *
1276 * When in the 'enable' state the card operates as normal.
1277 * When in the 'disable' state, the card enters into a low power mode.
1278 * When in the 'halt' state, the card is shut down and must be fully
1279 * restarted to come back on.
1280 */
1281 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1282 {
1283 struct iwl_host_cmd cmd = {
1284 .id = REPLY_CARD_STATE_CMD,
1285 .len = sizeof(u32),
1286 .data = &flags,
1287 .meta.flags = meta_flag,
1288 };
1289
1290 if (meta_flag & CMD_ASYNC)
1291 cmd.meta.u.callback = iwl_card_state_sync_callback;
1292
1293 return iwl_send_cmd(priv, &cmd);
1294 }
1295
1296 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1297 struct iwl_cmd *cmd, struct sk_buff *skb)
1298 {
1299 struct iwl_rx_packet *res = NULL;
1300
1301 if (!skb) {
1302 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1303 return 1;
1304 }
1305
1306 res = (struct iwl_rx_packet *)skb->data;
1307 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1308 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1309 res->hdr.flags);
1310 return 1;
1311 }
1312
1313 switch (res->u.add_sta.status) {
1314 case ADD_STA_SUCCESS_MSK:
1315 break;
1316 default:
1317 break;
1318 }
1319
1320 /* We didn't cache the SKB; let the caller free it */
1321 return 1;
1322 }
1323
1324 int iwl_send_add_station(struct iwl_priv *priv,
1325 struct iwl_addsta_cmd *sta, u8 flags)
1326 {
1327 struct iwl_rx_packet *res = NULL;
1328 int rc = 0;
1329 struct iwl_host_cmd cmd = {
1330 .id = REPLY_ADD_STA,
1331 .len = sizeof(struct iwl_addsta_cmd),
1332 .meta.flags = flags,
1333 .data = sta,
1334 };
1335
1336 if (flags & CMD_ASYNC)
1337 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1338 else
1339 cmd.meta.flags |= CMD_WANT_SKB;
1340
1341 rc = iwl_send_cmd(priv, &cmd);
1342
1343 if (rc || (flags & CMD_ASYNC))
1344 return rc;
1345
1346 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1347 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1348 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1349 res->hdr.flags);
1350 rc = -EIO;
1351 }
1352
1353 if (rc == 0) {
1354 switch (res->u.add_sta.status) {
1355 case ADD_STA_SUCCESS_MSK:
1356 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1357 break;
1358 default:
1359 rc = -EIO;
1360 IWL_WARNING("REPLY_ADD_STA failed\n");
1361 break;
1362 }
1363 }
1364
1365 priv->alloc_rxb_skb--;
1366 dev_kfree_skb_any(cmd.meta.u.skb);
1367
1368 return rc;
1369 }
1370
1371 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1372 struct ieee80211_key_conf *keyconf,
1373 u8 sta_id)
1374 {
1375 unsigned long flags;
1376 __le16 key_flags = 0;
1377
1378 switch (keyconf->alg) {
1379 case ALG_CCMP:
1380 key_flags |= STA_KEY_FLG_CCMP;
1381 key_flags |= cpu_to_le16(
1382 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1383 key_flags &= ~STA_KEY_FLG_INVALID;
1384 break;
1385 case ALG_TKIP:
1386 case ALG_WEP:
1387 default:
1388 return -EINVAL;
1389 }
1390 spin_lock_irqsave(&priv->sta_lock, flags);
1391 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1392 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1393 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1394 keyconf->keylen);
1395
1396 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1397 keyconf->keylen);
1398 priv->stations[sta_id].sta.key.key_flags = key_flags;
1399 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1400 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1401
1402 spin_unlock_irqrestore(&priv->sta_lock, flags);
1403
1404 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1405 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1406 return 0;
1407 }
1408
1409 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1410 {
1411 unsigned long flags;
1412
1413 spin_lock_irqsave(&priv->sta_lock, flags);
1414 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1415 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1416 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1417 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1418 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1419 spin_unlock_irqrestore(&priv->sta_lock, flags);
1420
1421 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1422 iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1423 return 0;
1424 }
1425
1426 static void iwl_clear_free_frames(struct iwl_priv *priv)
1427 {
1428 struct list_head *element;
1429
1430 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1431 priv->frames_count);
1432
1433 while (!list_empty(&priv->free_frames)) {
1434 element = priv->free_frames.next;
1435 list_del(element);
1436 kfree(list_entry(element, struct iwl_frame, list));
1437 priv->frames_count--;
1438 }
1439
1440 if (priv->frames_count) {
1441 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1442 priv->frames_count);
1443 priv->frames_count = 0;
1444 }
1445 }
1446
1447 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1448 {
1449 struct iwl_frame *frame;
1450 struct list_head *element;
1451 if (list_empty(&priv->free_frames)) {
1452 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1453 if (!frame) {
1454 IWL_ERROR("Could not allocate frame!\n");
1455 return NULL;
1456 }
1457
1458 priv->frames_count++;
1459 return frame;
1460 }
1461
1462 element = priv->free_frames.next;
1463 list_del(element);
1464 return list_entry(element, struct iwl_frame, list);
1465 }
1466
1467 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1468 {
1469 memset(frame, 0, sizeof(*frame));
1470 list_add(&frame->list, &priv->free_frames);
1471 }
1472
1473 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1474 struct ieee80211_hdr *hdr,
1475 const u8 *dest, int left)
1476 {
1477
1478 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1479 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1480 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1481 return 0;
1482
1483 if (priv->ibss_beacon->len > left)
1484 return 0;
1485
1486 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1487
1488 return priv->ibss_beacon->len;
1489 }
1490
1491 int iwl_rate_index_from_plcp(int plcp)
1492 {
1493 int i = 0;
1494
1495 if (plcp & RATE_MCS_HT_MSK) {
1496 i = (plcp & 0xff);
1497
1498 if (i >= IWL_RATE_MIMO_6M_PLCP)
1499 i = i - IWL_RATE_MIMO_6M_PLCP;
1500
1501 i += IWL_FIRST_OFDM_RATE;
1502 /* skip 9M not supported in ht*/
1503 if (i >= IWL_RATE_9M_INDEX)
1504 i += 1;
1505 if ((i >= IWL_FIRST_OFDM_RATE) &&
1506 (i <= IWL_LAST_OFDM_RATE))
1507 return i;
1508 } else {
1509 for (i = 0; i < ARRAY_SIZE(iwl_rates); i++)
1510 if (iwl_rates[i].plcp == (plcp &0xFF))
1511 return i;
1512 }
1513 return -1;
1514 }
1515
1516 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1517 {
1518 u8 i;
1519
1520 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1521 i = iwl_rates[i].next_ieee) {
1522 if (rate_mask & (1 << i))
1523 return iwl_rates[i].plcp;
1524 }
1525
1526 return IWL_RATE_INVALID;
1527 }
1528
1529 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1530 {
1531 struct iwl_frame *frame;
1532 unsigned int frame_size;
1533 int rc;
1534 u8 rate;
1535
1536 frame = iwl_get_free_frame(priv);
1537
1538 if (!frame) {
1539 IWL_ERROR("Could not obtain free frame buffer for beacon "
1540 "command.\n");
1541 return -ENOMEM;
1542 }
1543
1544 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1545 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1546 0xFF0);
1547 if (rate == IWL_INVALID_RATE)
1548 rate = IWL_RATE_6M_PLCP;
1549 } else {
1550 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1551 if (rate == IWL_INVALID_RATE)
1552 rate = IWL_RATE_1M_PLCP;
1553 }
1554
1555 frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1556
1557 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1558 &frame->u.cmd[0]);
1559
1560 iwl_free_frame(priv, frame);
1561
1562 return rc;
1563 }
1564
1565 /******************************************************************************
1566 *
1567 * EEPROM related functions
1568 *
1569 ******************************************************************************/
1570
1571 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1572 {
1573 memcpy(mac, priv->eeprom.mac_address, 6);
1574 }
1575
1576 /**
1577 * iwl_eeprom_init - read EEPROM contents
1578 *
1579 * Load the EEPROM from adapter into priv->eeprom
1580 *
1581 * NOTE: This routine uses the non-debug IO access functions.
1582 */
1583 int iwl_eeprom_init(struct iwl_priv *priv)
1584 {
1585 u16 *e = (u16 *)&priv->eeprom;
1586 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1587 u32 r;
1588 int sz = sizeof(priv->eeprom);
1589 int rc;
1590 int i;
1591 u16 addr;
1592
1593 /* The EEPROM structure has several padding buffers within it
1594 * and when adding new EEPROM maps is subject to programmer errors
1595 * which may be very difficult to identify without explicitly
1596 * checking the resulting size of the eeprom map. */
1597 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1598
1599 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1600 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1601 return -ENOENT;
1602 }
1603
1604 rc = iwl_eeprom_acquire_semaphore(priv);
1605 if (rc < 0) {
1606 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1607 return -ENOENT;
1608 }
1609
1610 /* eeprom is an array of 16bit values */
1611 for (addr = 0; addr < sz; addr += sizeof(u16)) {
1612 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1613 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1614
1615 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1616 i += IWL_EEPROM_ACCESS_DELAY) {
1617 r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1618 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1619 break;
1620 udelay(IWL_EEPROM_ACCESS_DELAY);
1621 }
1622
1623 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1624 IWL_ERROR("Time out reading EEPROM[%d]", addr);
1625 rc = -ETIMEDOUT;
1626 goto done;
1627 }
1628 e[addr / 2] = le16_to_cpu(r >> 16);
1629 }
1630 rc = 0;
1631
1632 done:
1633 iwl_eeprom_release_semaphore(priv);
1634 return rc;
1635 }
1636
1637 /******************************************************************************
1638 *
1639 * Misc. internal state and helper functions
1640 *
1641 ******************************************************************************/
1642 #ifdef CONFIG_IWLWIFI_DEBUG
1643
1644 /**
1645 * iwl_report_frame - dump frame to syslog during debug sessions
1646 *
1647 * hack this function to show different aspects of received frames,
1648 * including selective frame dumps.
1649 * group100 parameter selects whether to show 1 out of 100 good frames.
1650 *
1651 * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1652 * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1653 * is 3945-specific and gives bad output for 4965. Need to split the
1654 * functionality, keep common stuff here.
1655 */
1656 void iwl_report_frame(struct iwl_priv *priv,
1657 struct iwl_rx_packet *pkt,
1658 struct ieee80211_hdr *header, int group100)
1659 {
1660 u32 to_us;
1661 u32 print_summary = 0;
1662 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
1663 u32 hundred = 0;
1664 u32 dataframe = 0;
1665 u16 fc;
1666 u16 seq_ctl;
1667 u16 channel;
1668 u16 phy_flags;
1669 int rate_sym;
1670 u16 length;
1671 u16 status;
1672 u16 bcn_tmr;
1673 u32 tsf_low;
1674 u64 tsf;
1675 u8 rssi;
1676 u8 agc;
1677 u16 sig_avg;
1678 u16 noise_diff;
1679 struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1680 struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1681 struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1682 u8 *data = IWL_RX_DATA(pkt);
1683
1684 /* MAC header */
1685 fc = le16_to_cpu(header->frame_control);
1686 seq_ctl = le16_to_cpu(header->seq_ctrl);
1687
1688 /* metadata */
1689 channel = le16_to_cpu(rx_hdr->channel);
1690 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1691 rate_sym = rx_hdr->rate;
1692 length = le16_to_cpu(rx_hdr->len);
1693
1694 /* end-of-frame status and timestamp */
1695 status = le32_to_cpu(rx_end->status);
1696 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1697 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1698 tsf = le64_to_cpu(rx_end->timestamp);
1699
1700 /* signal statistics */
1701 rssi = rx_stats->rssi;
1702 agc = rx_stats->agc;
1703 sig_avg = le16_to_cpu(rx_stats->sig_avg);
1704 noise_diff = le16_to_cpu(rx_stats->noise_diff);
1705
1706 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1707
1708 /* if data frame is to us and all is good,
1709 * (optionally) print summary for only 1 out of every 100 */
1710 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1711 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1712 dataframe = 1;
1713 if (!group100)
1714 print_summary = 1; /* print each frame */
1715 else if (priv->framecnt_to_us < 100) {
1716 priv->framecnt_to_us++;
1717 print_summary = 0;
1718 } else {
1719 priv->framecnt_to_us = 0;
1720 print_summary = 1;
1721 hundred = 1;
1722 }
1723 } else {
1724 /* print summary for all other frames */
1725 print_summary = 1;
1726 }
1727
1728 if (print_summary) {
1729 char *title;
1730 u32 rate;
1731
1732 if (hundred)
1733 title = "100Frames";
1734 else if (fc & IEEE80211_FCTL_RETRY)
1735 title = "Retry";
1736 else if (ieee80211_is_assoc_response(fc))
1737 title = "AscRsp";
1738 else if (ieee80211_is_reassoc_response(fc))
1739 title = "RasRsp";
1740 else if (ieee80211_is_probe_response(fc)) {
1741 title = "PrbRsp";
1742 print_dump = 1; /* dump frame contents */
1743 } else if (ieee80211_is_beacon(fc)) {
1744 title = "Beacon";
1745 print_dump = 1; /* dump frame contents */
1746 } else if (ieee80211_is_atim(fc))
1747 title = "ATIM";
1748 else if (ieee80211_is_auth(fc))
1749 title = "Auth";
1750 else if (ieee80211_is_deauth(fc))
1751 title = "DeAuth";
1752 else if (ieee80211_is_disassoc(fc))
1753 title = "DisAssoc";
1754 else
1755 title = "Frame";
1756
1757 rate = iwl_rate_index_from_plcp(rate_sym);
1758 if (rate == -1)
1759 rate = 0;
1760 else
1761 rate = iwl_rates[rate].ieee / 2;
1762
1763 /* print frame summary.
1764 * MAC addresses show just the last byte (for brevity),
1765 * but you can hack it to show more, if you'd like to. */
1766 if (dataframe)
1767 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1768 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1769 title, fc, header->addr1[5],
1770 length, rssi, channel, rate);
1771 else {
1772 /* src/dst addresses assume managed mode */
1773 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1774 "src=0x%02x, rssi=%u, tim=%lu usec, "
1775 "phy=0x%02x, chnl=%d\n",
1776 title, fc, header->addr1[5],
1777 header->addr3[5], rssi,
1778 tsf_low - priv->scan_start_tsf,
1779 phy_flags, channel);
1780 }
1781 }
1782 if (print_dump)
1783 iwl_print_hex_dump(IWL_DL_RX, data, length);
1784 }
1785 #endif
1786
1787 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1788 {
1789 if (priv->hw_setting.shared_virt)
1790 pci_free_consistent(priv->pci_dev,
1791 sizeof(struct iwl_shared),
1792 priv->hw_setting.shared_virt,
1793 priv->hw_setting.shared_phys);
1794 }
1795
1796 /**
1797 * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1798 *
1799 * return : set the bit for each supported rate insert in ie
1800 */
1801 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1802 u16 basic_rate, int *left)
1803 {
1804 u16 ret_rates = 0, bit;
1805 int i;
1806 u8 *cnt = ie;
1807 u8 *rates = ie + 1;
1808
1809 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1810 if (bit & supported_rate) {
1811 ret_rates |= bit;
1812 rates[*cnt] = iwl_rates[i].ieee |
1813 ((bit & basic_rate) ? 0x80 : 0x00);
1814 (*cnt)++;
1815 (*left)--;
1816 if ((*left <= 0) ||
1817 (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1818 break;
1819 }
1820 }
1821
1822 return ret_rates;
1823 }
1824
1825 #ifdef CONFIG_IWLWIFI_HT
1826 void static iwl_set_ht_capab(struct ieee80211_hw *hw,
1827 struct ieee80211_ht_capability *ht_cap,
1828 u8 use_wide_chan);
1829 #endif
1830
1831 /**
1832 * iwl_fill_probe_req - fill in all required fields and IE for probe request
1833 */
1834 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1835 struct ieee80211_mgmt *frame,
1836 int left, int is_direct)
1837 {
1838 int len = 0;
1839 u8 *pos = NULL;
1840 u16 active_rates, ret_rates, cck_rates;
1841
1842 /* Make sure there is enough space for the probe request,
1843 * two mandatory IEs and the data */
1844 left -= 24;
1845 if (left < 0)
1846 return 0;
1847 len += 24;
1848
1849 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1850 memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1851 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1852 memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1853 frame->seq_ctrl = 0;
1854
1855 /* fill in our indirect SSID IE */
1856 /* ...next IE... */
1857
1858 left -= 2;
1859 if (left < 0)
1860 return 0;
1861 len += 2;
1862 pos = &(frame->u.probe_req.variable[0]);
1863 *pos++ = WLAN_EID_SSID;
1864 *pos++ = 0;
1865
1866 /* fill in our direct SSID IE... */
1867 if (is_direct) {
1868 /* ...next IE... */
1869 left -= 2 + priv->essid_len;
1870 if (left < 0)
1871 return 0;
1872 /* ... fill it in... */
1873 *pos++ = WLAN_EID_SSID;
1874 *pos++ = priv->essid_len;
1875 memcpy(pos, priv->essid, priv->essid_len);
1876 pos += priv->essid_len;
1877 len += 2 + priv->essid_len;
1878 }
1879
1880 /* fill in supported rate */
1881 /* ...next IE... */
1882 left -= 2;
1883 if (left < 0)
1884 return 0;
1885
1886 /* ... fill it in... */
1887 *pos++ = WLAN_EID_SUPP_RATES;
1888 *pos = 0;
1889
1890 priv->active_rate = priv->rates_mask;
1891 active_rates = priv->active_rate;
1892 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1893
1894 cck_rates = IWL_CCK_RATES_MASK & active_rates;
1895 ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
1896 priv->active_rate_basic, &left);
1897 active_rates &= ~ret_rates;
1898
1899 ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
1900 priv->active_rate_basic, &left);
1901 active_rates &= ~ret_rates;
1902
1903 len += 2 + *pos;
1904 pos += (*pos) + 1;
1905 if (active_rates == 0)
1906 goto fill_end;
1907
1908 /* fill in supported extended rate */
1909 /* ...next IE... */
1910 left -= 2;
1911 if (left < 0)
1912 return 0;
1913 /* ... fill it in... */
1914 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1915 *pos = 0;
1916 iwl_supported_rate_to_ie(pos, active_rates,
1917 priv->active_rate_basic, &left);
1918 if (*pos > 0)
1919 len += 2 + *pos;
1920
1921 #ifdef CONFIG_IWLWIFI_HT
1922 if (is_direct && priv->is_ht_enabled) {
1923 u8 use_wide_chan = 1;
1924
1925 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
1926 use_wide_chan = 0;
1927 pos += (*pos) + 1;
1928 *pos++ = WLAN_EID_HT_CAPABILITY;
1929 *pos++ = sizeof(struct ieee80211_ht_capability);
1930 iwl_set_ht_capab(NULL, (struct ieee80211_ht_capability *)pos,
1931 use_wide_chan);
1932 len += 2 + sizeof(struct ieee80211_ht_capability);
1933 }
1934 #endif /*CONFIG_IWLWIFI_HT */
1935
1936 fill_end:
1937 return (u16)len;
1938 }
1939
1940 /*
1941 * QoS support
1942 */
1943 #ifdef CONFIG_IWLWIFI_QOS
1944 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1945 struct iwl_qosparam_cmd *qos)
1946 {
1947
1948 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1949 sizeof(struct iwl_qosparam_cmd), qos);
1950 }
1951
1952 static void iwl_reset_qos(struct iwl_priv *priv)
1953 {
1954 u16 cw_min = 15;
1955 u16 cw_max = 1023;
1956 u8 aifs = 2;
1957 u8 is_legacy = 0;
1958 unsigned long flags;
1959 int i;
1960
1961 spin_lock_irqsave(&priv->lock, flags);
1962 priv->qos_data.qos_active = 0;
1963
1964 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1965 if (priv->qos_data.qos_enable)
1966 priv->qos_data.qos_active = 1;
1967 if (!(priv->active_rate & 0xfff0)) {
1968 cw_min = 31;
1969 is_legacy = 1;
1970 }
1971 } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1972 if (priv->qos_data.qos_enable)
1973 priv->qos_data.qos_active = 1;
1974 } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1975 cw_min = 31;
1976 is_legacy = 1;
1977 }
1978
1979 if (priv->qos_data.qos_active)
1980 aifs = 3;
1981
1982 priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1983 priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1984 priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1985 priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1986 priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1987
1988 if (priv->qos_data.qos_active) {
1989 i = 1;
1990 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1991 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1992 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1993 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1994 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1995
1996 i = 2;
1997 priv->qos_data.def_qos_parm.ac[i].cw_min =
1998 cpu_to_le16((cw_min + 1) / 2 - 1);
1999 priv->qos_data.def_qos_parm.ac[i].cw_max =
2000 cpu_to_le16(cw_max);
2001 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2002 if (is_legacy)
2003 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2004 cpu_to_le16(6016);
2005 else
2006 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2007 cpu_to_le16(3008);
2008 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2009
2010 i = 3;
2011 priv->qos_data.def_qos_parm.ac[i].cw_min =
2012 cpu_to_le16((cw_min + 1) / 4 - 1);
2013 priv->qos_data.def_qos_parm.ac[i].cw_max =
2014 cpu_to_le16((cw_max + 1) / 2 - 1);
2015 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2016 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2017 if (is_legacy)
2018 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2019 cpu_to_le16(3264);
2020 else
2021 priv->qos_data.def_qos_parm.ac[i].edca_txop =
2022 cpu_to_le16(1504);
2023 } else {
2024 for (i = 1; i < 4; i++) {
2025 priv->qos_data.def_qos_parm.ac[i].cw_min =
2026 cpu_to_le16(cw_min);
2027 priv->qos_data.def_qos_parm.ac[i].cw_max =
2028 cpu_to_le16(cw_max);
2029 priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2030 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2031 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2032 }
2033 }
2034 IWL_DEBUG_QOS("set QoS to default \n");
2035
2036 spin_unlock_irqrestore(&priv->lock, flags);
2037 }
2038
2039 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
2040 {
2041 unsigned long flags;
2042
2043 if (priv == NULL)
2044 return;
2045
2046 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2047 return;
2048
2049 if (!priv->qos_data.qos_enable)
2050 return;
2051
2052 spin_lock_irqsave(&priv->lock, flags);
2053 priv->qos_data.def_qos_parm.qos_flags = 0;
2054
2055 if (priv->qos_data.qos_cap.q_AP.queue_request &&
2056 !priv->qos_data.qos_cap.q_AP.txop_request)
2057 priv->qos_data.def_qos_parm.qos_flags |=
2058 QOS_PARAM_FLG_TXOP_TYPE_MSK;
2059 if (priv->qos_data.qos_active)
2060 priv->qos_data.def_qos_parm.qos_flags |=
2061 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2062
2063 #ifdef CONFIG_IWLWIFI_HT
2064 if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
2065 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2066 #endif /* CONFIG_IWLWIFI_HT */
2067
2068 spin_unlock_irqrestore(&priv->lock, flags);
2069
2070 if (force || iwl_is_associated(priv)) {
2071 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2072 priv->qos_data.qos_active,
2073 priv->qos_data.def_qos_parm.qos_flags);
2074
2075 iwl_send_qos_params_command(priv,
2076 &(priv->qos_data.def_qos_parm));
2077 }
2078 }
2079
2080 #endif /* CONFIG_IWLWIFI_QOS */
2081 /*
2082 * Power management (not Tx power!) functions
2083 */
2084 #define MSEC_TO_USEC 1024
2085
2086 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2087 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2088 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2089 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2090 __constant_cpu_to_le32(X1), \
2091 __constant_cpu_to_le32(X2), \
2092 __constant_cpu_to_le32(X3), \
2093 __constant_cpu_to_le32(X4)}
2094
2095
2096 /* default power management (not Tx power) table values */
2097 /* for tim 0-10 */
2098 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2099 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2100 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2101 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2102 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2103 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2104 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2105 };
2106
2107 /* for tim > 10 */
2108 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2109 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2110 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2111 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2112 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2113 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2114 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2115 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2116 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2117 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2118 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2119 };
2120
2121 int iwl_power_init_handle(struct iwl_priv *priv)
2122 {
2123 int rc = 0, i;
2124 struct iwl_power_mgr *pow_data;
2125 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2126 u16 pci_pm;
2127
2128 IWL_DEBUG_POWER("Initialize power \n");
2129
2130 pow_data = &(priv->power_data);
2131
2132 memset(pow_data, 0, sizeof(*pow_data));
2133
2134 pow_data->active_index = IWL_POWER_RANGE_0;
2135 pow_data->dtim_val = 0xffff;
2136
2137 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2138 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2139
2140 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2141 if (rc != 0)
2142 return 0;
2143 else {
2144 struct iwl_powertable_cmd *cmd;
2145
2146 IWL_DEBUG_POWER("adjust power command flags\n");
2147
2148 for (i = 0; i < IWL_POWER_AC; i++) {
2149 cmd = &pow_data->pwr_range_0[i].cmd;
2150
2151 if (pci_pm & 0x1)
2152 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2153 else
2154 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2155 }
2156 }
2157 return rc;
2158 }
2159
2160 static int iwl_update_power_cmd(struct iwl_priv *priv,
2161 struct iwl_powertable_cmd *cmd, u32 mode)
2162 {
2163 int rc = 0, i;
2164 u8 skip;
2165 u32 max_sleep = 0;
2166 struct iwl_power_vec_entry *range;
2167 u8 period = 0;
2168 struct iwl_power_mgr *pow_data;
2169
2170 if (mode > IWL_POWER_INDEX_5) {
2171 IWL_DEBUG_POWER("Error invalid power mode \n");
2172 return -1;
2173 }
2174 pow_data = &(priv->power_data);
2175
2176 if (pow_data->active_index == IWL_POWER_RANGE_0)
2177 range = &pow_data->pwr_range_0[0];
2178 else
2179 range = &pow_data->pwr_range_1[1];
2180
2181 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2182
2183 #ifdef IWL_MAC80211_DISABLE
2184 if (priv->assoc_network != NULL) {
2185 unsigned long flags;
2186
2187 period = priv->assoc_network->tim.tim_period;
2188 }
2189 #endif /*IWL_MAC80211_DISABLE */
2190 skip = range[mode].no_dtim;
2191
2192 if (period == 0) {
2193 period = 1;
2194 skip = 0;
2195 }
2196
2197 if (skip == 0) {
2198 max_sleep = period;
2199 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2200 } else {
2201 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2202 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2203 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2204 }
2205
2206 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2207 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2208 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2209 }
2210
2211 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2212 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2213 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2214 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2215 le32_to_cpu(cmd->sleep_interval[0]),
2216 le32_to_cpu(cmd->sleep_interval[1]),
2217 le32_to_cpu(cmd->sleep_interval[2]),
2218 le32_to_cpu(cmd->sleep_interval[3]),
2219 le32_to_cpu(cmd->sleep_interval[4]));
2220
2221 return rc;
2222 }
2223
2224 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2225 {
2226 u32 final_mode = mode;
2227 int rc;
2228 struct iwl_powertable_cmd cmd;
2229
2230 /* If on battery, set to 3,
2231 * if plugged into AC power, set to CAM ("continuously aware mode"),
2232 * else user level */
2233 switch (mode) {
2234 case IWL_POWER_BATTERY:
2235 final_mode = IWL_POWER_INDEX_3;
2236 break;
2237 case IWL_POWER_AC:
2238 final_mode = IWL_POWER_MODE_CAM;
2239 break;
2240 default:
2241 final_mode = mode;
2242 break;
2243 }
2244
2245 cmd.keep_alive_beacons = 0;
2246
2247 iwl_update_power_cmd(priv, &cmd, final_mode);
2248
2249 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2250
2251 if (final_mode == IWL_POWER_MODE_CAM)
2252 clear_bit(STATUS_POWER_PMI, &priv->status);
2253 else
2254 set_bit(STATUS_POWER_PMI, &priv->status);
2255
2256 return rc;
2257 }
2258
2259 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2260 {
2261 /* Filter incoming packets to determine if they are targeted toward
2262 * this network, discarding packets coming from ourselves */
2263 switch (priv->iw_mode) {
2264 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
2265 /* packets from our adapter are dropped (echo) */
2266 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2267 return 0;
2268 /* {broad,multi}cast packets to our IBSS go through */
2269 if (is_multicast_ether_addr(header->addr1))
2270 return !compare_ether_addr(header->addr3, priv->bssid);
2271 /* packets to our adapter go through */
2272 return !compare_ether_addr(header->addr1, priv->mac_addr);
2273 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2274 /* packets from our adapter are dropped (echo) */
2275 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2276 return 0;
2277 /* {broad,multi}cast packets to our BSS go through */
2278 if (is_multicast_ether_addr(header->addr1))
2279 return !compare_ether_addr(header->addr2, priv->bssid);
2280 /* packets to our adapter go through */
2281 return !compare_ether_addr(header->addr1, priv->mac_addr);
2282 }
2283
2284 return 1;
2285 }
2286
2287 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2288
2289 const char *iwl_get_tx_fail_reason(u32 status)
2290 {
2291 switch (status & TX_STATUS_MSK) {
2292 case TX_STATUS_SUCCESS:
2293 return "SUCCESS";
2294 TX_STATUS_ENTRY(SHORT_LIMIT);
2295 TX_STATUS_ENTRY(LONG_LIMIT);
2296 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2297 TX_STATUS_ENTRY(MGMNT_ABORT);
2298 TX_STATUS_ENTRY(NEXT_FRAG);
2299 TX_STATUS_ENTRY(LIFE_EXPIRE);
2300 TX_STATUS_ENTRY(DEST_PS);
2301 TX_STATUS_ENTRY(ABORTED);
2302 TX_STATUS_ENTRY(BT_RETRY);
2303 TX_STATUS_ENTRY(STA_INVALID);
2304 TX_STATUS_ENTRY(FRAG_DROPPED);
2305 TX_STATUS_ENTRY(TID_DISABLE);
2306 TX_STATUS_ENTRY(FRAME_FLUSHED);
2307 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2308 TX_STATUS_ENTRY(TX_LOCKED);
2309 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2310 }
2311
2312 return "UNKNOWN";
2313 }
2314
2315 /**
2316 * iwl_scan_cancel - Cancel any currently executing HW scan
2317 *
2318 * NOTE: priv->mutex is not required before calling this function
2319 */
2320 static int iwl_scan_cancel(struct iwl_priv *priv)
2321 {
2322 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2323 clear_bit(STATUS_SCANNING, &priv->status);
2324 return 0;
2325 }
2326
2327 if (test_bit(STATUS_SCANNING, &priv->status)) {
2328 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2329 IWL_DEBUG_SCAN("Queuing scan abort.\n");
2330 set_bit(STATUS_SCAN_ABORTING, &priv->status);
2331 queue_work(priv->workqueue, &priv->abort_scan);
2332
2333 } else
2334 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2335
2336 return test_bit(STATUS_SCANNING, &priv->status);
2337 }
2338
2339 return 0;
2340 }
2341
2342 /**
2343 * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2344 * @ms: amount of time to wait (in milliseconds) for scan to abort
2345 *
2346 * NOTE: priv->mutex must be held before calling this function
2347 */
2348 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2349 {
2350 unsigned long now = jiffies;
2351 int ret;
2352
2353 ret = iwl_scan_cancel(priv);
2354 if (ret && ms) {
2355 mutex_unlock(&priv->mutex);
2356 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2357 test_bit(STATUS_SCANNING, &priv->status))
2358 msleep(1);
2359 mutex_lock(&priv->mutex);
2360
2361 return test_bit(STATUS_SCANNING, &priv->status);
2362 }
2363
2364 return ret;
2365 }
2366
2367 static void iwl_sequence_reset(struct iwl_priv *priv)
2368 {
2369 /* Reset ieee stats */
2370
2371 /* We don't reset the net_device_stats (ieee->stats) on
2372 * re-association */
2373
2374 priv->last_seq_num = -1;
2375 priv->last_frag_num = -1;
2376 priv->last_packet_time = 0;
2377
2378 iwl_scan_cancel(priv);
2379 }
2380
2381 #define MAX_UCODE_BEACON_INTERVAL 4096
2382 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
2383
2384 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2385 {
2386 u16 new_val = 0;
2387 u16 beacon_factor = 0;
2388
2389 beacon_factor =
2390 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2391 / MAX_UCODE_BEACON_INTERVAL;
2392 new_val = beacon_val / beacon_factor;
2393
2394 return cpu_to_le16(new_val);
2395 }
2396
2397 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2398 {
2399 u64 interval_tm_unit;
2400 u64 tsf, result;
2401 unsigned long flags;
2402 struct ieee80211_conf *conf = NULL;
2403 u16 beacon_int = 0;
2404
2405 conf = ieee80211_get_hw_conf(priv->hw);
2406
2407 spin_lock_irqsave(&priv->lock, flags);
2408 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2409 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2410
2411 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2412
2413 tsf = priv->timestamp1;
2414 tsf = ((tsf << 32) | priv->timestamp0);
2415
2416 beacon_int = priv->beacon_int;
2417 spin_unlock_irqrestore(&priv->lock, flags);
2418
2419 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2420 if (beacon_int == 0) {
2421 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2422 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2423 } else {
2424 priv->rxon_timing.beacon_interval =
2425 cpu_to_le16(beacon_int);
2426 priv->rxon_timing.beacon_interval =
2427 iwl_adjust_beacon_interval(
2428 le16_to_cpu(priv->rxon_timing.beacon_interval));
2429 }
2430
2431 priv->rxon_timing.atim_window = 0;
2432 } else {
2433 priv->rxon_timing.beacon_interval =
2434 iwl_adjust_beacon_interval(conf->beacon_int);
2435 /* TODO: we need to get atim_window from upper stack
2436 * for now we set to 0 */
2437 priv->rxon_timing.atim_window = 0;
2438 }
2439
2440 interval_tm_unit =
2441 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2442 result = do_div(tsf, interval_tm_unit);
2443 priv->rxon_timing.beacon_init_val =
2444 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2445
2446 IWL_DEBUG_ASSOC
2447 ("beacon interval %d beacon timer %d beacon tim %d\n",
2448 le16_to_cpu(priv->rxon_timing.beacon_interval),
2449 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2450 le16_to_cpu(priv->rxon_timing.atim_window));
2451 }
2452
2453 static int iwl_scan_initiate(struct iwl_priv *priv)
2454 {
2455 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2456 IWL_ERROR("APs don't scan.\n");
2457 return 0;
2458 }
2459
2460 if (!iwl_is_ready_rf(priv)) {
2461 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2462 return -EIO;
2463 }
2464
2465 if (test_bit(STATUS_SCANNING, &priv->status)) {
2466 IWL_DEBUG_SCAN("Scan already in progress.\n");
2467 return -EAGAIN;
2468 }
2469
2470 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2471 IWL_DEBUG_SCAN("Scan request while abort pending. "
2472 "Queuing.\n");
2473 return -EAGAIN;
2474 }
2475
2476 IWL_DEBUG_INFO("Starting scan...\n");
2477 priv->scan_bands = 2;
2478 set_bit(STATUS_SCANNING, &priv->status);
2479 priv->scan_start = jiffies;
2480 priv->scan_pass_start = priv->scan_start;
2481
2482 queue_work(priv->workqueue, &priv->request_scan);
2483
2484 return 0;
2485 }
2486
2487 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2488 {
2489 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2490
2491 if (hw_decrypt)
2492 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2493 else
2494 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2495
2496 return 0;
2497 }
2498
2499 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2500 {
2501 if (phymode == MODE_IEEE80211A) {
2502 priv->staging_rxon.flags &=
2503 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2504 | RXON_FLG_CCK_MSK);
2505 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2506 } else {
2507 /* Copied from iwl_bg_post_associate() */
2508 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2509 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2510 else
2511 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2512
2513 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2514 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2515
2516 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2517 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2518 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2519 }
2520 }
2521
2522 /*
2523 * initialize rxon structure with default values from eeprom
2524 */
2525 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2526 {
2527 const struct iwl_channel_info *ch_info;
2528
2529 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2530
2531 switch (priv->iw_mode) {
2532 case IEEE80211_IF_TYPE_AP:
2533 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2534 break;
2535
2536 case IEEE80211_IF_TYPE_STA:
2537 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2538 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2539 break;
2540
2541 case IEEE80211_IF_TYPE_IBSS:
2542 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2543 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2544 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2545 RXON_FILTER_ACCEPT_GRP_MSK;
2546 break;
2547
2548 case IEEE80211_IF_TYPE_MNTR:
2549 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2550 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2551 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2552 break;
2553 }
2554
2555 #if 0
2556 /* TODO: Figure out when short_preamble would be set and cache from
2557 * that */
2558 if (!hw_to_local(priv->hw)->short_preamble)
2559 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2560 else
2561 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2562 #endif
2563
2564 ch_info = iwl_get_channel_info(priv, priv->phymode,
2565 le16_to_cpu(priv->staging_rxon.channel));
2566
2567 if (!ch_info)
2568 ch_info = &priv->channel_info[0];
2569
2570 /*
2571 * in some case A channels are all non IBSS
2572 * in this case force B/G channel
2573 */
2574 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2575 !(is_channel_ibss(ch_info)))
2576 ch_info = &priv->channel_info[0];
2577
2578 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2579 if (is_channel_a_band(ch_info))
2580 priv->phymode = MODE_IEEE80211A;
2581 else
2582 priv->phymode = MODE_IEEE80211G;
2583
2584 iwl_set_flags_for_phymode(priv, priv->phymode);
2585
2586 priv->staging_rxon.ofdm_basic_rates =
2587 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2588 priv->staging_rxon.cck_basic_rates =
2589 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2590
2591 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2592 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2593 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2594 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2595 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2596 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2597 iwl4965_set_rxon_chain(priv);
2598 }
2599
2600 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2601 {
2602 if (!iwl_is_ready_rf(priv))
2603 return -EAGAIN;
2604
2605 if (mode == IEEE80211_IF_TYPE_IBSS) {
2606 const struct iwl_channel_info *ch_info;
2607
2608 ch_info = iwl_get_channel_info(priv,
2609 priv->phymode,
2610 le16_to_cpu(priv->staging_rxon.channel));
2611
2612 if (!ch_info || !is_channel_ibss(ch_info)) {
2613 IWL_ERROR("channel %d not IBSS channel\n",
2614 le16_to_cpu(priv->staging_rxon.channel));
2615 return -EINVAL;
2616 }
2617 }
2618
2619 cancel_delayed_work(&priv->scan_check);
2620 if (iwl_scan_cancel_timeout(priv, 100)) {
2621 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2622 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2623 return -EAGAIN;
2624 }
2625
2626 priv->iw_mode = mode;
2627
2628 iwl_connection_init_rx_config(priv);
2629 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2630
2631 iwl_clear_stations_table(priv);
2632
2633 iwl_commit_rxon(priv);
2634
2635 return 0;
2636 }
2637
2638 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2639 struct ieee80211_tx_control *ctl,
2640 struct iwl_cmd *cmd,
2641 struct sk_buff *skb_frag,
2642 int last_frag)
2643 {
2644 struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2645
2646 switch (keyinfo->alg) {
2647 case ALG_CCMP:
2648 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2649 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2650 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2651 break;
2652
2653 case ALG_TKIP:
2654 #if 0
2655 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2656
2657 if (last_frag)
2658 memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2659 8);
2660 else
2661 memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2662 #endif
2663 break;
2664
2665 case ALG_WEP:
2666 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2667 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2668
2669 if (keyinfo->keylen == 13)
2670 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2671
2672 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2673
2674 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2675 "with key %d\n", ctl->key_idx);
2676 break;
2677
2678 default:
2679 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2680 break;
2681 }
2682 }
2683
2684 /*
2685 * handle build REPLY_TX command notification.
2686 */
2687 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2688 struct iwl_cmd *cmd,
2689 struct ieee80211_tx_control *ctrl,
2690 struct ieee80211_hdr *hdr,
2691 int is_unicast, u8 std_id)
2692 {
2693 __le16 *qc;
2694 u16 fc = le16_to_cpu(hdr->frame_control);
2695 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2696
2697 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2698 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2699 tx_flags |= TX_CMD_FLG_ACK_MSK;
2700 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2701 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2702 if (ieee80211_is_probe_response(fc) &&
2703 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2704 tx_flags |= TX_CMD_FLG_TSF_MSK;
2705 } else {
2706 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2707 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2708 }
2709
2710 cmd->cmd.tx.sta_id = std_id;
2711 if (ieee80211_get_morefrag(hdr))
2712 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2713
2714 qc = ieee80211_get_qos_ctrl(hdr);
2715 if (qc) {
2716 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2717 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2718 } else
2719 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2720
2721 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2722 tx_flags |= TX_CMD_FLG_RTS_MSK;
2723 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2724 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2725 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2726 tx_flags |= TX_CMD_FLG_CTS_MSK;
2727 }
2728
2729 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2730 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2731
2732 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2733 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2734 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2735 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2736 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2737 else
2738 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2739 } else
2740 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2741
2742 cmd->cmd.tx.driver_txop = 0;
2743 cmd->cmd.tx.tx_flags = tx_flags;
2744 cmd->cmd.tx.next_frame_len = 0;
2745 }
2746
2747 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2748 {
2749 int sta_id;
2750 u16 fc = le16_to_cpu(hdr->frame_control);
2751 DECLARE_MAC_BUF(mac);
2752
2753 /* If this frame is broadcast or not data then use the broadcast
2754 * station id */
2755 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2756 is_multicast_ether_addr(hdr->addr1))
2757 return priv->hw_setting.bcast_sta_id;
2758
2759 switch (priv->iw_mode) {
2760
2761 /* If this frame is part of a BSS network (we're a station), then
2762 * we use the AP's station id */
2763 case IEEE80211_IF_TYPE_STA:
2764 return IWL_AP_ID;
2765
2766 /* If we are an AP, then find the station, or use BCAST */
2767 case IEEE80211_IF_TYPE_AP:
2768 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2769 if (sta_id != IWL_INVALID_STATION)
2770 return sta_id;
2771 return priv->hw_setting.bcast_sta_id;
2772
2773 /* If this frame is part of a IBSS network, then we use the
2774 * target specific station id */
2775 case IEEE80211_IF_TYPE_IBSS:
2776 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2777 if (sta_id != IWL_INVALID_STATION)
2778 return sta_id;
2779
2780 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2781
2782 if (sta_id != IWL_INVALID_STATION)
2783 return sta_id;
2784
2785 IWL_DEBUG_DROP("Station %s not in station map. "
2786 "Defaulting to broadcast...\n",
2787 print_mac(mac, hdr->addr1));
2788 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2789 return priv->hw_setting.bcast_sta_id;
2790
2791 default:
2792 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2793 return priv->hw_setting.bcast_sta_id;
2794 }
2795 }
2796
2797 /*
2798 * start REPLY_TX command process
2799 */
2800 static int iwl_tx_skb(struct iwl_priv *priv,
2801 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2802 {
2803 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2804 struct iwl_tfd_frame *tfd;
2805 u32 *control_flags;
2806 int txq_id = ctl->queue;
2807 struct iwl_tx_queue *txq = NULL;
2808 struct iwl_queue *q = NULL;
2809 dma_addr_t phys_addr;
2810 dma_addr_t txcmd_phys;
2811 struct iwl_cmd *out_cmd = NULL;
2812 u16 len, idx, len_org;
2813 u8 id, hdr_len, unicast;
2814 u8 sta_id;
2815 u16 seq_number = 0;
2816 u16 fc;
2817 __le16 *qc;
2818 u8 wait_write_ptr = 0;
2819 unsigned long flags;
2820 int rc;
2821
2822 spin_lock_irqsave(&priv->lock, flags);
2823 if (iwl_is_rfkill(priv)) {
2824 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2825 goto drop_unlock;
2826 }
2827
2828 if (!priv->interface_id) {
2829 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2830 goto drop_unlock;
2831 }
2832
2833 if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2834 IWL_ERROR("ERROR: No TX rate available.\n");
2835 goto drop_unlock;
2836 }
2837
2838 unicast = !is_multicast_ether_addr(hdr->addr1);
2839 id = 0;
2840
2841 fc = le16_to_cpu(hdr->frame_control);
2842
2843 #ifdef CONFIG_IWLWIFI_DEBUG
2844 if (ieee80211_is_auth(fc))
2845 IWL_DEBUG_TX("Sending AUTH frame\n");
2846 else if (ieee80211_is_assoc_request(fc))
2847 IWL_DEBUG_TX("Sending ASSOC frame\n");
2848 else if (ieee80211_is_reassoc_request(fc))
2849 IWL_DEBUG_TX("Sending REASSOC frame\n");
2850 #endif
2851
2852 if (!iwl_is_associated(priv) &&
2853 ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2854 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2855 goto drop_unlock;
2856 }
2857
2858 spin_unlock_irqrestore(&priv->lock, flags);
2859
2860 hdr_len = ieee80211_get_hdrlen(fc);
2861 sta_id = iwl_get_sta_id(priv, hdr);
2862 if (sta_id == IWL_INVALID_STATION) {
2863 DECLARE_MAC_BUF(mac);
2864
2865 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2866 print_mac(mac, hdr->addr1));
2867 goto drop;
2868 }
2869
2870 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2871
2872 qc = ieee80211_get_qos_ctrl(hdr);
2873 if (qc) {
2874 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2875 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2876 IEEE80211_SCTL_SEQ;
2877 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2878 (hdr->seq_ctrl &
2879 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2880 seq_number += 0x10;
2881 #ifdef CONFIG_IWLWIFI_HT
2882 #ifdef CONFIG_IWLWIFI_HT_AGG
2883 /* aggregation is on for this <sta,tid> */
2884 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2885 txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2886 #endif /* CONFIG_IWLWIFI_HT_AGG */
2887 #endif /* CONFIG_IWLWIFI_HT */
2888 }
2889 txq = &priv->txq[txq_id];
2890 q = &txq->q;
2891
2892 spin_lock_irqsave(&priv->lock, flags);
2893
2894 tfd = &txq->bd[q->write_ptr];
2895 memset(tfd, 0, sizeof(*tfd));
2896 control_flags = (u32 *) tfd;
2897 idx = get_cmd_index(q, q->write_ptr, 0);
2898
2899 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
2900 txq->txb[q->write_ptr].skb[0] = skb;
2901 memcpy(&(txq->txb[q->write_ptr].status.control),
2902 ctl, sizeof(struct ieee80211_tx_control));
2903 out_cmd = &txq->cmd[idx];
2904 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2905 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2906 out_cmd->hdr.cmd = REPLY_TX;
2907 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2908 INDEX_TO_SEQ(q->write_ptr)));
2909 /* copy frags header */
2910 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2911
2912 /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2913 len = priv->hw_setting.tx_cmd_len +
2914 sizeof(struct iwl_cmd_header) + hdr_len;
2915
2916 len_org = len;
2917 len = (len + 3) & ~3;
2918
2919 if (len_org != len)
2920 len_org = 1;
2921 else
2922 len_org = 0;
2923
2924 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2925 offsetof(struct iwl_cmd, hdr);
2926
2927 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2928
2929 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2930 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2931
2932 /* 802.11 null functions have no payload... */
2933 len = skb->len - hdr_len;
2934 if (len) {
2935 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2936 len, PCI_DMA_TODEVICE);
2937 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2938 }
2939
2940 if (len_org)
2941 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2942
2943 len = (u16)skb->len;
2944 out_cmd->cmd.tx.len = cpu_to_le16(len);
2945
2946 /* TODO need this for burst mode later on */
2947 iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2948
2949 /* set is_hcca to 0; it probably will never be implemented */
2950 iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2951
2952 iwl4965_tx_cmd(priv, out_cmd, sta_id, txcmd_phys,
2953 hdr, hdr_len, ctl, NULL);
2954
2955 if (!ieee80211_get_morefrag(hdr)) {
2956 txq->need_update = 1;
2957 if (qc) {
2958 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2959 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2960 }
2961 } else {
2962 wait_write_ptr = 1;
2963 txq->need_update = 0;
2964 }
2965
2966 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2967 sizeof(out_cmd->cmd.tx));
2968
2969 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2970 ieee80211_get_hdrlen(fc));
2971
2972 iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2973
2974 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2975 rc = iwl_tx_queue_update_write_ptr(priv, txq);
2976 spin_unlock_irqrestore(&priv->lock, flags);
2977
2978 if (rc)
2979 return rc;
2980
2981 if ((iwl_queue_space(q) < q->high_mark)
2982 && priv->mac80211_registered) {
2983 if (wait_write_ptr) {
2984 spin_lock_irqsave(&priv->lock, flags);
2985 txq->need_update = 1;
2986 iwl_tx_queue_update_write_ptr(priv, txq);
2987 spin_unlock_irqrestore(&priv->lock, flags);
2988 }
2989
2990 ieee80211_stop_queue(priv->hw, ctl->queue);
2991 }
2992
2993 return 0;
2994
2995 drop_unlock:
2996 spin_unlock_irqrestore(&priv->lock, flags);
2997 drop:
2998 return -1;
2999 }
3000
3001 static void iwl_set_rate(struct iwl_priv *priv)
3002 {
3003 const struct ieee80211_hw_mode *hw = NULL;
3004 struct ieee80211_rate *rate;
3005 int i;
3006
3007 hw = iwl_get_hw_mode(priv, priv->phymode);
3008 if (!hw) {
3009 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
3010 return;
3011 }
3012
3013 priv->active_rate = 0;
3014 priv->active_rate_basic = 0;
3015
3016 IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3017 hw->mode == MODE_IEEE80211A ?
3018 'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3019
3020 for (i = 0; i < hw->num_rates; i++) {
3021 rate = &(hw->rates[i]);
3022 if ((rate->val < IWL_RATE_COUNT) &&
3023 (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3024 IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3025 rate->val, iwl_rates[rate->val].plcp,
3026 (rate->flags & IEEE80211_RATE_BASIC) ?
3027 "*" : "");
3028 priv->active_rate |= (1 << rate->val);
3029 if (rate->flags & IEEE80211_RATE_BASIC)
3030 priv->active_rate_basic |= (1 << rate->val);
3031 } else
3032 IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3033 rate->val, iwl_rates[rate->val].plcp);
3034 }
3035
3036 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3037 priv->active_rate, priv->active_rate_basic);
3038
3039 /*
3040 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3041 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3042 * OFDM
3043 */
3044 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3045 priv->staging_rxon.cck_basic_rates =
3046 ((priv->active_rate_basic &
3047 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3048 else
3049 priv->staging_rxon.cck_basic_rates =
3050 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3051
3052 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3053 priv->staging_rxon.ofdm_basic_rates =
3054 ((priv->active_rate_basic &
3055 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3056 IWL_FIRST_OFDM_RATE) & 0xFF;
3057 else
3058 priv->staging_rxon.ofdm_basic_rates =
3059 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3060 }
3061
3062 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
3063 {
3064 unsigned long flags;
3065
3066 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3067 return;
3068
3069 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3070 disable_radio ? "OFF" : "ON");
3071
3072 if (disable_radio) {
3073 iwl_scan_cancel(priv);
3074 /* FIXME: This is a workaround for AP */
3075 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3076 spin_lock_irqsave(&priv->lock, flags);
3077 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3078 CSR_UCODE_SW_BIT_RFKILL);
3079 spin_unlock_irqrestore(&priv->lock, flags);
3080 iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3081 set_bit(STATUS_RF_KILL_SW, &priv->status);
3082 }
3083 return;
3084 }
3085
3086 spin_lock_irqsave(&priv->lock, flags);
3087 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3088
3089 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3090 spin_unlock_irqrestore(&priv->lock, flags);
3091
3092 /* wake up ucode */
3093 msleep(10);
3094
3095 spin_lock_irqsave(&priv->lock, flags);
3096 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3097 if (!iwl_grab_restricted_access(priv))
3098 iwl_release_restricted_access(priv);
3099 spin_unlock_irqrestore(&priv->lock, flags);
3100
3101 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3102 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3103 "disabled by HW switch\n");
3104 return;
3105 }
3106
3107 queue_work(priv->workqueue, &priv->restart);
3108 return;
3109 }
3110
3111 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3112 u32 decrypt_res, struct ieee80211_rx_status *stats)
3113 {
3114 u16 fc =
3115 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3116
3117 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3118 return;
3119
3120 if (!(fc & IEEE80211_FCTL_PROTECTED))
3121 return;
3122
3123 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3124 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3125 case RX_RES_STATUS_SEC_TYPE_TKIP:
3126 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3127 RX_RES_STATUS_BAD_ICV_MIC)
3128 stats->flag |= RX_FLAG_MMIC_ERROR;
3129 case RX_RES_STATUS_SEC_TYPE_WEP:
3130 case RX_RES_STATUS_SEC_TYPE_CCMP:
3131 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3132 RX_RES_STATUS_DECRYPT_OK) {
3133 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3134 stats->flag |= RX_FLAG_DECRYPTED;
3135 }
3136 break;
3137
3138 default:
3139 break;
3140 }
3141 }
3142
3143 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3144 struct iwl_rx_mem_buffer *rxb,
3145 void *data, short len,
3146 struct ieee80211_rx_status *stats,
3147 u16 phy_flags)
3148 {
3149 struct iwl_rt_rx_hdr *iwl_rt;
3150
3151 /* First cache any information we need before we overwrite
3152 * the information provided in the skb from the hardware */
3153 s8 signal = stats->ssi;
3154 s8 noise = 0;
3155 int rate = stats->rate;
3156 u64 tsf = stats->mactime;
3157 __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3158
3159 /* We received data from the HW, so stop the watchdog */
3160 if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3161 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3162 return;
3163 }
3164
3165 /* copy the frame data to write after where the radiotap header goes */
3166 iwl_rt = (void *)rxb->skb->data;
3167 memmove(iwl_rt->payload, data, len);
3168
3169 iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3170 iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3171
3172 /* total header + data */
3173 iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3174
3175 /* Set the size of the skb to the size of the frame */
3176 skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3177
3178 /* Big bitfield of all the fields we provide in radiotap */
3179 iwl_rt->rt_hdr.it_present =
3180 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3181 (1 << IEEE80211_RADIOTAP_FLAGS) |
3182 (1 << IEEE80211_RADIOTAP_RATE) |
3183 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3184 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3185 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3186 (1 << IEEE80211_RADIOTAP_ANTENNA));
3187
3188 /* Zero the flags, we'll add to them as we go */
3189 iwl_rt->rt_flags = 0;
3190
3191 iwl_rt->rt_tsf = cpu_to_le64(tsf);
3192
3193 /* Convert to dBm */
3194 iwl_rt->rt_dbmsignal = signal;
3195 iwl_rt->rt_dbmnoise = noise;
3196
3197 /* Convert the channel frequency and set the flags */
3198 iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3199 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3200 iwl_rt->rt_chbitmask =
3201 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3202 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3203 iwl_rt->rt_chbitmask =
3204 cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3205 else /* 802.11g */
3206 iwl_rt->rt_chbitmask =
3207 cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3208
3209 rate = iwl_rate_index_from_plcp(rate);
3210 if (rate == -1)
3211 iwl_rt->rt_rate = 0;
3212 else
3213 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3214
3215 /* antenna number */
3216 iwl_rt->rt_antenna =
3217 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3218
3219 /* set the preamble flag if we have it */
3220 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3221 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3222
3223 IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3224
3225 stats->flag |= RX_FLAG_RADIOTAP;
3226 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3227 rxb->skb = NULL;
3228 }
3229
3230
3231 #define IWL_PACKET_RETRY_TIME HZ
3232
3233 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3234 {
3235 u16 sc = le16_to_cpu(header->seq_ctrl);
3236 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3237 u16 frag = sc & IEEE80211_SCTL_FRAG;
3238 u16 *last_seq, *last_frag;
3239 unsigned long *last_time;
3240
3241 switch (priv->iw_mode) {
3242 case IEEE80211_IF_TYPE_IBSS:{
3243 struct list_head *p;
3244 struct iwl_ibss_seq *entry = NULL;
3245 u8 *mac = header->addr2;
3246 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3247
3248 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3249 entry = list_entry(p, struct iwl_ibss_seq, list);
3250 if (!compare_ether_addr(entry->mac, mac))
3251 break;
3252 }
3253 if (p == &priv->ibss_mac_hash[index]) {
3254 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3255 if (!entry) {
3256 IWL_ERROR("Cannot malloc new mac entry\n");
3257 return 0;
3258 }
3259 memcpy(entry->mac, mac, ETH_ALEN);
3260 entry->seq_num = seq;
3261 entry->frag_num = frag;
3262 entry->packet_time = jiffies;
3263 list_add(&entry->list, &priv->ibss_mac_hash[index]);
3264 return 0;
3265 }
3266 last_seq = &entry->seq_num;
3267 last_frag = &entry->frag_num;
3268 last_time = &entry->packet_time;
3269 break;
3270 }
3271 case IEEE80211_IF_TYPE_STA:
3272 last_seq = &priv->last_seq_num;
3273 last_frag = &priv->last_frag_num;
3274 last_time = &priv->last_packet_time;
3275 break;
3276 default:
3277 return 0;
3278 }
3279 if ((*last_seq == seq) &&
3280 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3281 if (*last_frag == frag)
3282 goto drop;
3283 if (*last_frag + 1 != frag)
3284 /* out-of-order fragment */
3285 goto drop;
3286 } else
3287 *last_seq = seq;
3288
3289 *last_frag = frag;
3290 *last_time = jiffies;
3291 return 0;
3292
3293 drop:
3294 return 1;
3295 }
3296
3297 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3298
3299 #include "iwl-spectrum.h"
3300
3301 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
3302 #define BEACON_TIME_MASK_HIGH 0xFF000000
3303 #define TIME_UNIT 1024
3304
3305 /*
3306 * extended beacon time format
3307 * time in usec will be changed into a 32-bit value in 8:24 format
3308 * the high 1 byte is the beacon counts
3309 * the lower 3 bytes is the time in usec within one beacon interval
3310 */
3311
3312 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3313 {
3314 u32 quot;
3315 u32 rem;
3316 u32 interval = beacon_interval * 1024;
3317
3318 if (!interval || !usec)
3319 return 0;
3320
3321 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3322 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3323
3324 return (quot << 24) + rem;
3325 }
3326
3327 /* base is usually what we get from ucode with each received frame,
3328 * the same as HW timer counter counting down
3329 */
3330
3331 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3332 {
3333 u32 base_low = base & BEACON_TIME_MASK_LOW;
3334 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3335 u32 interval = beacon_interval * TIME_UNIT;
3336 u32 res = (base & BEACON_TIME_MASK_HIGH) +
3337 (addon & BEACON_TIME_MASK_HIGH);
3338
3339 if (base_low > addon_low)
3340 res += base_low - addon_low;
3341 else if (base_low < addon_low) {
3342 res += interval + base_low - addon_low;
3343 res += (1 << 24);
3344 } else
3345 res += (1 << 24);
3346
3347 return cpu_to_le32(res);
3348 }
3349
3350 static int iwl_get_measurement(struct iwl_priv *priv,
3351 struct ieee80211_measurement_params *params,
3352 u8 type)
3353 {
3354 struct iwl_spectrum_cmd spectrum;
3355 struct iwl_rx_packet *res;
3356 struct iwl_host_cmd cmd = {
3357 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3358 .data = (void *)&spectrum,
3359 .meta.flags = CMD_WANT_SKB,
3360 };
3361 u32 add_time = le64_to_cpu(params->start_time);
3362 int rc;
3363 int spectrum_resp_status;
3364 int duration = le16_to_cpu(params->duration);
3365
3366 if (iwl_is_associated(priv))
3367 add_time =
3368 iwl_usecs_to_beacons(
3369 le64_to_cpu(params->start_time) - priv->last_tsf,
3370 le16_to_cpu(priv->rxon_timing.beacon_interval));
3371
3372 memset(&spectrum, 0, sizeof(spectrum));
3373
3374 spectrum.channel_count = cpu_to_le16(1);
3375 spectrum.flags =
3376 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3377 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3378 cmd.len = sizeof(spectrum);
3379 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3380
3381 if (iwl_is_associated(priv))
3382 spectrum.start_time =
3383 iwl_add_beacon_time(priv->last_beacon_time,
3384 add_time,
3385 le16_to_cpu(priv->rxon_timing.beacon_interval));
3386 else
3387 spectrum.start_time = 0;
3388
3389 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3390 spectrum.channels[0].channel = params->channel;
3391 spectrum.channels[0].type = type;
3392 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3393 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3394 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3395
3396 rc = iwl_send_cmd_sync(priv, &cmd);
3397 if (rc)
3398 return rc;
3399
3400 res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3401 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3402 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3403 rc = -EIO;
3404 }
3405
3406 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3407 switch (spectrum_resp_status) {
3408 case 0: /* Command will be handled */
3409 if (res->u.spectrum.id != 0xff) {
3410 IWL_DEBUG_INFO
3411 ("Replaced existing measurement: %d\n",
3412 res->u.spectrum.id);
3413 priv->measurement_status &= ~MEASUREMENT_READY;
3414 }
3415 priv->measurement_status |= MEASUREMENT_ACTIVE;
3416 rc = 0;
3417 break;
3418
3419 case 1: /* Command will not be handled */
3420 rc = -EAGAIN;
3421 break;
3422 }
3423
3424 dev_kfree_skb_any(cmd.meta.u.skb);
3425
3426 return rc;
3427 }
3428 #endif
3429
3430 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3431 struct iwl_tx_info *tx_sta)
3432 {
3433
3434 tx_sta->status.ack_signal = 0;
3435 tx_sta->status.excessive_retries = 0;
3436 tx_sta->status.queue_length = 0;
3437 tx_sta->status.queue_number = 0;
3438
3439 if (in_interrupt())
3440 ieee80211_tx_status_irqsafe(priv->hw,
3441 tx_sta->skb[0], &(tx_sta->status));
3442 else
3443 ieee80211_tx_status(priv->hw,
3444 tx_sta->skb[0], &(tx_sta->status));
3445
3446 tx_sta->skb[0] = NULL;
3447 }
3448
3449 /**
3450 * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3451 *
3452 * When FW advances 'R' index, all entries between old and
3453 * new 'R' index need to be reclaimed. As result, some free space
3454 * forms. If there is enough free space (> low mark), wake Tx queue.
3455 */
3456 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3457 {
3458 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3459 struct iwl_queue *q = &txq->q;
3460 int nfreed = 0;
3461
3462 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3463 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3464 "is out of range [0-%d] %d %d.\n", txq_id,
3465 index, q->n_bd, q->write_ptr, q->read_ptr);
3466 return 0;
3467 }
3468
3469 for (index = iwl_queue_inc_wrap(index, q->n_bd);
3470 q->read_ptr != index;
3471 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3472 if (txq_id != IWL_CMD_QUEUE_NUM) {
3473 iwl_txstatus_to_ieee(priv,
3474 &(txq->txb[txq->q.read_ptr]));
3475 iwl_hw_txq_free_tfd(priv, txq);
3476 } else if (nfreed > 1) {
3477 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3478 q->write_ptr, q->read_ptr);
3479 queue_work(priv->workqueue, &priv->restart);
3480 }
3481 nfreed++;
3482 }
3483
3484 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3485 (txq_id != IWL_CMD_QUEUE_NUM) &&
3486 priv->mac80211_registered)
3487 ieee80211_wake_queue(priv->hw, txq_id);
3488
3489
3490 return nfreed;
3491 }
3492
3493 static int iwl_is_tx_success(u32 status)
3494 {
3495 status &= TX_STATUS_MSK;
3496 return (status == TX_STATUS_SUCCESS)
3497 || (status == TX_STATUS_DIRECT_DONE);
3498 }
3499
3500 /******************************************************************************
3501 *
3502 * Generic RX handler implementations
3503 *
3504 ******************************************************************************/
3505 #ifdef CONFIG_IWLWIFI_HT
3506 #ifdef CONFIG_IWLWIFI_HT_AGG
3507
3508 static inline int iwl_get_ra_sta_id(struct iwl_priv *priv,
3509 struct ieee80211_hdr *hdr)
3510 {
3511 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3512 return IWL_AP_ID;
3513 else {
3514 u8 *da = ieee80211_get_DA(hdr);
3515 return iwl_hw_find_station(priv, da);
3516 }
3517 }
3518
3519 static struct ieee80211_hdr *iwl_tx_queue_get_hdr(
3520 struct iwl_priv *priv, int txq_id, int idx)
3521 {
3522 if (priv->txq[txq_id].txb[idx].skb[0])
3523 return (struct ieee80211_hdr *)priv->txq[txq_id].
3524 txb[idx].skb[0]->data;
3525 return NULL;
3526 }
3527
3528 static inline u32 iwl_get_scd_ssn(struct iwl_tx_resp *tx_resp)
3529 {
3530 __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3531 tx_resp->frame_count);
3532 return le32_to_cpu(*scd_ssn) & MAX_SN;
3533
3534 }
3535 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3536 struct iwl_ht_agg *agg,
3537 struct iwl_tx_resp *tx_resp,
3538 u16 start_idx)
3539 {
3540 u32 status;
3541 __le32 *frame_status = &tx_resp->status;
3542 struct ieee80211_tx_status *tx_status = NULL;
3543 struct ieee80211_hdr *hdr = NULL;
3544 int i, sh;
3545 int txq_id, idx;
3546 u16 seq;
3547
3548 if (agg->wait_for_ba)
3549 IWL_DEBUG_TX_REPLY("got tx repsons w/o back\n");
3550
3551 agg->frame_count = tx_resp->frame_count;
3552 agg->start_idx = start_idx;
3553 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3554 agg->bitmap0 = agg->bitmap1 = 0;
3555
3556 if (agg->frame_count == 1) {
3557 struct iwl_tx_queue *txq ;
3558 status = le32_to_cpu(frame_status[0]);
3559
3560 txq_id = agg->txq_id;
3561 txq = &priv->txq[txq_id];
3562 /* FIXME: code repetition */
3563 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3564 agg->frame_count, agg->start_idx);
3565
3566 tx_status = &(priv->txq[txq_id].txb[txq->q.read_ptr].status);
3567 tx_status->retry_count = tx_resp->failure_frame;
3568 tx_status->queue_number = status & 0xff;
3569 tx_status->queue_length = tx_resp->bt_kill_count;
3570 tx_status->queue_length |= tx_resp->failure_rts;
3571
3572 tx_status->flags = iwl_is_tx_success(status)?
3573 IEEE80211_TX_STATUS_ACK : 0;
3574 tx_status->control.tx_rate =
3575 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3576 /* FIXME: code repetition end */
3577
3578 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3579 status & 0xff, tx_resp->failure_frame);
3580 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3581 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3582
3583 agg->wait_for_ba = 0;
3584 } else {
3585 u64 bitmap = 0;
3586 int start = agg->start_idx;
3587
3588 for (i = 0; i < agg->frame_count; i++) {
3589 u16 sc;
3590 status = le32_to_cpu(frame_status[i]);
3591 seq = status >> 16;
3592 idx = SEQ_TO_INDEX(seq);
3593 txq_id = SEQ_TO_QUEUE(seq);
3594
3595 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3596 AGG_TX_STATE_ABORT_MSK))
3597 continue;
3598
3599 IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3600 agg->frame_count, txq_id, idx);
3601
3602 hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3603
3604 sc = le16_to_cpu(hdr->seq_ctrl);
3605 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3606 IWL_ERROR("BUG_ON idx doesn't match seq control"
3607 " idx=%d, seq_idx=%d, seq=%d\n",
3608 idx, SEQ_TO_SN(sc),
3609 hdr->seq_ctrl);
3610 return -1;
3611 }
3612
3613 IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3614 i, idx, SEQ_TO_SN(sc));
3615
3616 sh = idx - start;
3617 if (sh > 64) {
3618 sh = (start - idx) + 0xff;
3619 bitmap = bitmap << sh;
3620 sh = 0;
3621 start = idx;
3622 } else if (sh < -64)
3623 sh = 0xff - (start - idx);
3624 else if (sh < 0) {
3625 sh = start - idx;
3626 start = idx;
3627 bitmap = bitmap << sh;
3628 sh = 0;
3629 }
3630 bitmap |= (1 << sh);
3631 IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3632 start, (u32)(bitmap & 0xFFFFFFFF));
3633 }
3634
3635 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3636 agg->bitmap1 = bitmap >> 32;
3637 agg->start_idx = start;
3638 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3639 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3640 agg->frame_count, agg->start_idx,
3641 agg->bitmap0);
3642
3643 if (bitmap)
3644 agg->wait_for_ba = 1;
3645 }
3646 return 0;
3647 }
3648 #endif
3649 #endif
3650
3651 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3652 struct iwl_rx_mem_buffer *rxb)
3653 {
3654 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3655 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3656 int txq_id = SEQ_TO_QUEUE(sequence);
3657 int index = SEQ_TO_INDEX(sequence);
3658 struct iwl_tx_queue *txq = &priv->txq[txq_id];
3659 struct ieee80211_tx_status *tx_status;
3660 struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3661 u32 status = le32_to_cpu(tx_resp->status);
3662 #ifdef CONFIG_IWLWIFI_HT
3663 #ifdef CONFIG_IWLWIFI_HT_AGG
3664 int tid, sta_id;
3665 #endif
3666 #endif
3667
3668 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3669 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3670 "is out of range [0-%d] %d %d\n", txq_id,
3671 index, txq->q.n_bd, txq->q.write_ptr,
3672 txq->q.read_ptr);
3673 return;
3674 }
3675
3676 #ifdef CONFIG_IWLWIFI_HT
3677 #ifdef CONFIG_IWLWIFI_HT_AGG
3678 if (txq->sched_retry) {
3679 const u32 scd_ssn = iwl_get_scd_ssn(tx_resp);
3680 struct ieee80211_hdr *hdr =
3681 iwl_tx_queue_get_hdr(priv, txq_id, index);
3682 struct iwl_ht_agg *agg = NULL;
3683 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3684
3685 if (qc == NULL) {
3686 IWL_ERROR("BUG_ON qc is null!!!!\n");
3687 return;
3688 }
3689
3690 tid = le16_to_cpu(*qc) & 0xf;
3691
3692 sta_id = iwl_get_ra_sta_id(priv, hdr);
3693 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3694 IWL_ERROR("Station not known for\n");
3695 return;
3696 }
3697
3698 agg = &priv->stations[sta_id].tid[tid].agg;
3699
3700 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3701
3702 if ((tx_resp->frame_count == 1) &&
3703 !iwl_is_tx_success(status)) {
3704 /* TODO: send BAR */
3705 }
3706
3707 if ((txq->q.read_ptr != (scd_ssn & 0xff))) {
3708 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3709 IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3710 "%d index %d\n", scd_ssn , index);
3711 iwl_tx_queue_reclaim(priv, txq_id, index);
3712 }
3713 } else {
3714 #endif /* CONFIG_IWLWIFI_HT_AGG */
3715 #endif /* CONFIG_IWLWIFI_HT */
3716 tx_status = &(txq->txb[txq->q.read_ptr].status);
3717
3718 tx_status->retry_count = tx_resp->failure_frame;
3719 tx_status->queue_number = status;
3720 tx_status->queue_length = tx_resp->bt_kill_count;
3721 tx_status->queue_length |= tx_resp->failure_rts;
3722
3723 tx_status->flags =
3724 iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3725
3726 tx_status->control.tx_rate =
3727 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3728
3729 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3730 "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
3731 status, le32_to_cpu(tx_resp->rate_n_flags),
3732 tx_resp->failure_frame);
3733
3734 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3735 if (index != -1)
3736 iwl_tx_queue_reclaim(priv, txq_id, index);
3737 #ifdef CONFIG_IWLWIFI_HT
3738 #ifdef CONFIG_IWLWIFI_HT_AGG
3739 }
3740 #endif /* CONFIG_IWLWIFI_HT_AGG */
3741 #endif /* CONFIG_IWLWIFI_HT */
3742
3743 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3744 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3745 }
3746
3747
3748 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3749 struct iwl_rx_mem_buffer *rxb)
3750 {
3751 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3752 struct iwl_alive_resp *palive;
3753 struct delayed_work *pwork;
3754
3755 palive = &pkt->u.alive_frame;
3756
3757 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3758 "0x%01X 0x%01X\n",
3759 palive->is_valid, palive->ver_type,
3760 palive->ver_subtype);
3761
3762 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3763 IWL_DEBUG_INFO("Initialization Alive received.\n");
3764 memcpy(&priv->card_alive_init,
3765 &pkt->u.alive_frame,
3766 sizeof(struct iwl_init_alive_resp));
3767 pwork = &priv->init_alive_start;
3768 } else {
3769 IWL_DEBUG_INFO("Runtime Alive received.\n");
3770 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3771 sizeof(struct iwl_alive_resp));
3772 pwork = &priv->alive_start;
3773 }
3774
3775 /* We delay the ALIVE response by 5ms to
3776 * give the HW RF Kill time to activate... */
3777 if (palive->is_valid == UCODE_VALID_OK)
3778 queue_delayed_work(priv->workqueue, pwork,
3779 msecs_to_jiffies(5));
3780 else
3781 IWL_WARNING("uCode did not respond OK.\n");
3782 }
3783
3784 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3785 struct iwl_rx_mem_buffer *rxb)
3786 {
3787 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3788
3789 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3790 return;
3791 }
3792
3793 static void iwl_rx_reply_error(struct iwl_priv *priv,
3794 struct iwl_rx_mem_buffer *rxb)
3795 {
3796 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3797
3798 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3799 "seq 0x%04X ser 0x%08X\n",
3800 le32_to_cpu(pkt->u.err_resp.error_type),
3801 get_cmd_string(pkt->u.err_resp.cmd_id),
3802 pkt->u.err_resp.cmd_id,
3803 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3804 le32_to_cpu(pkt->u.err_resp.error_info));
3805 }
3806
3807 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3808
3809 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3810 {
3811 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3812 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3813 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3814 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3815 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3816 rxon->channel = csa->channel;
3817 priv->staging_rxon.channel = csa->channel;
3818 }
3819
3820 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3821 struct iwl_rx_mem_buffer *rxb)
3822 {
3823 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3824 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3825 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3826
3827 if (!report->state) {
3828 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3829 "Spectrum Measure Notification: Start\n");
3830 return;
3831 }
3832
3833 memcpy(&priv->measure_report, report, sizeof(*report));
3834 priv->measurement_status |= MEASUREMENT_READY;
3835 #endif
3836 }
3837
3838 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3839 struct iwl_rx_mem_buffer *rxb)
3840 {
3841 #ifdef CONFIG_IWLWIFI_DEBUG
3842 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3843 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3844 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3845 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3846 #endif
3847 }
3848
3849 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3850 struct iwl_rx_mem_buffer *rxb)
3851 {
3852 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3853 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3854 "notification for %s:\n",
3855 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3856 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3857 }
3858
3859 static void iwl_bg_beacon_update(struct work_struct *work)
3860 {
3861 struct iwl_priv *priv =
3862 container_of(work, struct iwl_priv, beacon_update);
3863 struct sk_buff *beacon;
3864
3865 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3866 beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3867
3868 if (!beacon) {
3869 IWL_ERROR("update beacon failed\n");
3870 return;
3871 }
3872
3873 mutex_lock(&priv->mutex);
3874 /* new beacon skb is allocated every time; dispose previous.*/
3875 if (priv->ibss_beacon)
3876 dev_kfree_skb(priv->ibss_beacon);
3877
3878 priv->ibss_beacon = beacon;
3879 mutex_unlock(&priv->mutex);
3880
3881 iwl_send_beacon_cmd(priv);
3882 }
3883
3884 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3885 struct iwl_rx_mem_buffer *rxb)
3886 {
3887 #ifdef CONFIG_IWLWIFI_DEBUG
3888 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3889 struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3890 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3891
3892 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3893 "tsf %d %d rate %d\n",
3894 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3895 beacon->beacon_notify_hdr.failure_frame,
3896 le32_to_cpu(beacon->ibss_mgr_status),
3897 le32_to_cpu(beacon->high_tsf),
3898 le32_to_cpu(beacon->low_tsf), rate);
3899 #endif
3900
3901 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3902 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3903 queue_work(priv->workqueue, &priv->beacon_update);
3904 }
3905
3906 /* Service response to REPLY_SCAN_CMD (0x80) */
3907 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3908 struct iwl_rx_mem_buffer *rxb)
3909 {
3910 #ifdef CONFIG_IWLWIFI_DEBUG
3911 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3912 struct iwl_scanreq_notification *notif =
3913 (struct iwl_scanreq_notification *)pkt->u.raw;
3914
3915 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3916 #endif
3917 }
3918
3919 /* Service SCAN_START_NOTIFICATION (0x82) */
3920 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3921 struct iwl_rx_mem_buffer *rxb)
3922 {
3923 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3924 struct iwl_scanstart_notification *notif =
3925 (struct iwl_scanstart_notification *)pkt->u.raw;
3926 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3927 IWL_DEBUG_SCAN("Scan start: "
3928 "%d [802.11%s] "
3929 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3930 notif->channel,
3931 notif->band ? "bg" : "a",
3932 notif->tsf_high,
3933 notif->tsf_low, notif->status, notif->beacon_timer);
3934 }
3935
3936 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3937 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3938 struct iwl_rx_mem_buffer *rxb)
3939 {
3940 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3941 struct iwl_scanresults_notification *notif =
3942 (struct iwl_scanresults_notification *)pkt->u.raw;
3943
3944 IWL_DEBUG_SCAN("Scan ch.res: "
3945 "%d [802.11%s] "
3946 "(TSF: 0x%08X:%08X) - %d "
3947 "elapsed=%lu usec (%dms since last)\n",
3948 notif->channel,
3949 notif->band ? "bg" : "a",
3950 le32_to_cpu(notif->tsf_high),
3951 le32_to_cpu(notif->tsf_low),
3952 le32_to_cpu(notif->statistics[0]),
3953 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3954 jiffies_to_msecs(elapsed_jiffies
3955 (priv->last_scan_jiffies, jiffies)));
3956
3957 priv->last_scan_jiffies = jiffies;
3958 }
3959
3960 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3961 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3962 struct iwl_rx_mem_buffer *rxb)
3963 {
3964 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3965 struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3966
3967 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3968 scan_notif->scanned_channels,
3969 scan_notif->tsf_low,
3970 scan_notif->tsf_high, scan_notif->status);
3971
3972 /* The HW is no longer scanning */
3973 clear_bit(STATUS_SCAN_HW, &priv->status);
3974
3975 /* The scan completion notification came in, so kill that timer... */
3976 cancel_delayed_work(&priv->scan_check);
3977
3978 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3979 (priv->scan_bands == 2) ? "2.4" : "5.2",
3980 jiffies_to_msecs(elapsed_jiffies
3981 (priv->scan_pass_start, jiffies)));
3982
3983 /* Remove this scanned band from the list
3984 * of pending bands to scan */
3985 priv->scan_bands--;
3986
3987 /* If a request to abort was given, or the scan did not succeed
3988 * then we reset the scan state machine and terminate,
3989 * re-queuing another scan if one has been requested */
3990 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3991 IWL_DEBUG_INFO("Aborted scan completed.\n");
3992 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3993 } else {
3994 /* If there are more bands on this scan pass reschedule */
3995 if (priv->scan_bands > 0)
3996 goto reschedule;
3997 }
3998
3999 priv->last_scan_jiffies = jiffies;
4000 IWL_DEBUG_INFO("Setting scan to off\n");
4001
4002 clear_bit(STATUS_SCANNING, &priv->status);
4003
4004 IWL_DEBUG_INFO("Scan took %dms\n",
4005 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4006
4007 queue_work(priv->workqueue, &priv->scan_completed);
4008
4009 return;
4010
4011 reschedule:
4012 priv->scan_pass_start = jiffies;
4013 queue_work(priv->workqueue, &priv->request_scan);
4014 }
4015
4016 /* Handle notification from uCode that card's power state is changing
4017 * due to software, hardware, or critical temperature RFKILL */
4018 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
4019 struct iwl_rx_mem_buffer *rxb)
4020 {
4021 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
4022 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4023 unsigned long status = priv->status;
4024
4025 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4026 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4027 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4028
4029 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4030 RF_CARD_DISABLED)) {
4031
4032 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4033 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4034
4035 if (!iwl_grab_restricted_access(priv)) {
4036 iwl_write_restricted(
4037 priv, HBUS_TARG_MBX_C,
4038 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4039
4040 iwl_release_restricted_access(priv);
4041 }
4042
4043 if (!(flags & RXON_CARD_DISABLED)) {
4044 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4045 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4046 if (!iwl_grab_restricted_access(priv)) {
4047 iwl_write_restricted(
4048 priv, HBUS_TARG_MBX_C,
4049 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4050
4051 iwl_release_restricted_access(priv);
4052 }
4053 }
4054
4055 if (flags & RF_CARD_DISABLED) {
4056 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4057 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4058 iwl_read32(priv, CSR_UCODE_DRV_GP1);
4059 if (!iwl_grab_restricted_access(priv))
4060 iwl_release_restricted_access(priv);
4061 }
4062 }
4063
4064 if (flags & HW_CARD_DISABLED)
4065 set_bit(STATUS_RF_KILL_HW, &priv->status);
4066 else
4067 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4068
4069
4070 if (flags & SW_CARD_DISABLED)
4071 set_bit(STATUS_RF_KILL_SW, &priv->status);
4072 else
4073 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4074
4075 if (!(flags & RXON_CARD_DISABLED))
4076 iwl_scan_cancel(priv);
4077
4078 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4079 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4080 (test_bit(STATUS_RF_KILL_SW, &status) !=
4081 test_bit(STATUS_RF_KILL_SW, &priv->status)))
4082 queue_work(priv->workqueue, &priv->rf_kill);
4083 else
4084 wake_up_interruptible(&priv->wait_command_queue);
4085 }
4086
4087 /**
4088 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
4089 *
4090 * Setup the RX handlers for each of the reply types sent from the uCode
4091 * to the host.
4092 *
4093 * This function chains into the hardware specific files for them to setup
4094 * any hardware specific handlers as well.
4095 */
4096 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
4097 {
4098 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
4099 priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
4100 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
4101 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
4102 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4103 iwl_rx_spectrum_measure_notif;
4104 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
4105 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4106 iwl_rx_pm_debug_statistics_notif;
4107 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
4108
4109 /* NOTE: iwl_rx_statistics is different based on whether
4110 * the build is for the 3945 or the 4965. See the
4111 * corresponding implementation in iwl-XXXX.c
4112 *
4113 * The same handler is used for both the REPLY to a
4114 * discrete statistics request from the host as well as
4115 * for the periodic statistics notification from the uCode
4116 */
4117 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
4118 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
4119
4120 priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
4121 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
4122 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4123 iwl_rx_scan_results_notif;
4124 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4125 iwl_rx_scan_complete_notif;
4126 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
4127 priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
4128
4129 /* Setup hardware specific Rx handlers */
4130 iwl_hw_rx_handler_setup(priv);
4131 }
4132
4133 /**
4134 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4135 * @rxb: Rx buffer to reclaim
4136 *
4137 * If an Rx buffer has an async callback associated with it the callback
4138 * will be executed. The attached skb (if present) will only be freed
4139 * if the callback returns 1
4140 */
4141 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
4142 struct iwl_rx_mem_buffer *rxb)
4143 {
4144 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
4145 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4146 int txq_id = SEQ_TO_QUEUE(sequence);
4147 int index = SEQ_TO_INDEX(sequence);
4148 int huge = sequence & SEQ_HUGE_FRAME;
4149 int cmd_index;
4150 struct iwl_cmd *cmd;
4151
4152 /* If a Tx command is being handled and it isn't in the actual
4153 * command queue then there a command routing bug has been introduced
4154 * in the queue management code. */
4155 if (txq_id != IWL_CMD_QUEUE_NUM)
4156 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4157 txq_id, pkt->hdr.cmd);
4158 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4159
4160 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4161 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4162
4163 /* Input error checking is done when commands are added to queue. */
4164 if (cmd->meta.flags & CMD_WANT_SKB) {
4165 cmd->meta.source->u.skb = rxb->skb;
4166 rxb->skb = NULL;
4167 } else if (cmd->meta.u.callback &&
4168 !cmd->meta.u.callback(priv, cmd, rxb->skb))
4169 rxb->skb = NULL;
4170
4171 iwl_tx_queue_reclaim(priv, txq_id, index);
4172
4173 if (!(cmd->meta.flags & CMD_ASYNC)) {
4174 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4175 wake_up_interruptible(&priv->wait_command_queue);
4176 }
4177 }
4178
4179 /************************** RX-FUNCTIONS ****************************/
4180 /*
4181 * Rx theory of operation
4182 *
4183 * The host allocates 32 DMA target addresses and passes the host address
4184 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
4185 * 0 to 31
4186 *
4187 * Rx Queue Indexes
4188 * The host/firmware share two index registers for managing the Rx buffers.
4189 *
4190 * The READ index maps to the first position that the firmware may be writing
4191 * to -- the driver can read up to (but not including) this position and get
4192 * good data.
4193 * The READ index is managed by the firmware once the card is enabled.
4194 *
4195 * The WRITE index maps to the last position the driver has read from -- the
4196 * position preceding WRITE is the last slot the firmware can place a packet.
4197 *
4198 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4199 * WRITE = READ.
4200 *
4201 * During initialization the host sets up the READ queue position to the first
4202 * INDEX position, and WRITE to the last (READ - 1 wrapped)
4203 *
4204 * When the firmware places a packet in a buffer it will advance the READ index
4205 * and fire the RX interrupt. The driver can then query the READ index and
4206 * process as many packets as possible, moving the WRITE index forward as it
4207 * resets the Rx queue buffers with new memory.
4208 *
4209 * The management in the driver is as follows:
4210 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
4211 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4212 * to replenish the iwl->rxq->rx_free.
4213 * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
4214 * iwl->rxq is replenished and the READ INDEX is updated (updating the
4215 * 'processed' and 'read' driver indexes as well)
4216 * + A received packet is processed and handed to the kernel network stack,
4217 * detached from the iwl->rxq. The driver 'processed' index is updated.
4218 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4219 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4220 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
4221 * were enough free buffers and RX_STALLED is set it is cleared.
4222 *
4223 *
4224 * Driver sequence:
4225 *
4226 * iwl_rx_queue_alloc() Allocates rx_free
4227 * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
4228 * iwl_rx_queue_restock
4229 * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
4230 * queue, updates firmware pointers, and updates
4231 * the WRITE index. If insufficient rx_free buffers
4232 * are available, schedules iwl_rx_replenish
4233 *
4234 * -- enable interrupts --
4235 * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
4236 * READ INDEX, detaching the SKB from the pool.
4237 * Moves the packet buffer from queue to rx_used.
4238 * Calls iwl_rx_queue_restock to refill any empty
4239 * slots.
4240 * ...
4241 *
4242 */
4243
4244 /**
4245 * iwl_rx_queue_space - Return number of free slots available in queue.
4246 */
4247 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
4248 {
4249 int s = q->read - q->write;
4250 if (s <= 0)
4251 s += RX_QUEUE_SIZE;
4252 /* keep some buffer to not confuse full and empty queue */
4253 s -= 2;
4254 if (s < 0)
4255 s = 0;
4256 return s;
4257 }
4258
4259 /**
4260 * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4261 *
4262 * NOTE: This function has 3945 and 4965 specific code sections
4263 * but is declared in base due to the majority of the
4264 * implementation being the same (only a numeric constant is
4265 * different)
4266 *
4267 */
4268 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
4269 {
4270 u32 reg = 0;
4271 int rc = 0;
4272 unsigned long flags;
4273
4274 spin_lock_irqsave(&q->lock, flags);
4275
4276 if (q->need_update == 0)
4277 goto exit_unlock;
4278
4279 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4280 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4281
4282 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4283 iwl_set_bit(priv, CSR_GP_CNTRL,
4284 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4285 goto exit_unlock;
4286 }
4287
4288 rc = iwl_grab_restricted_access(priv);
4289 if (rc)
4290 goto exit_unlock;
4291
4292 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
4293 q->write & ~0x7);
4294 iwl_release_restricted_access(priv);
4295 } else
4296 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4297
4298
4299 q->need_update = 0;
4300
4301 exit_unlock:
4302 spin_unlock_irqrestore(&q->lock, flags);
4303 return rc;
4304 }
4305
4306 /**
4307 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
4308 *
4309 * NOTE: This function has 3945 and 4965 specific code paths in it.
4310 */
4311 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
4312 dma_addr_t dma_addr)
4313 {
4314 return cpu_to_le32((u32)(dma_addr >> 8));
4315 }
4316
4317
4318 /**
4319 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4320 *
4321 * If there are slots in the RX queue that need to be restocked,
4322 * and we have free pre-allocated buffers, fill the ranks as much
4323 * as we can pulling from rx_free.
4324 *
4325 * This moves the 'write' index forward to catch up with 'processed', and
4326 * also updates the memory address in the firmware to reference the new
4327 * target buffer.
4328 */
4329 int iwl_rx_queue_restock(struct iwl_priv *priv)
4330 {
4331 struct iwl_rx_queue *rxq = &priv->rxq;
4332 struct list_head *element;
4333 struct iwl_rx_mem_buffer *rxb;
4334 unsigned long flags;
4335 int write, rc;
4336
4337 spin_lock_irqsave(&rxq->lock, flags);
4338 write = rxq->write & ~0x7;
4339 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4340 element = rxq->rx_free.next;
4341 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4342 list_del(element);
4343 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4344 rxq->queue[rxq->write] = rxb;
4345 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4346 rxq->free_count--;
4347 }
4348 spin_unlock_irqrestore(&rxq->lock, flags);
4349 /* If the pre-allocated buffer pool is dropping low, schedule to
4350 * refill it */
4351 if (rxq->free_count <= RX_LOW_WATERMARK)
4352 queue_work(priv->workqueue, &priv->rx_replenish);
4353
4354
4355 /* If we've added more space for the firmware to place data, tell it */
4356 if ((write != (rxq->write & ~0x7))
4357 || (abs(rxq->write - rxq->read) > 7)) {
4358 spin_lock_irqsave(&rxq->lock, flags);
4359 rxq->need_update = 1;
4360 spin_unlock_irqrestore(&rxq->lock, flags);
4361 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4362 if (rc)
4363 return rc;
4364 }
4365
4366 return 0;
4367 }
4368
4369 /**
4370 * iwl_rx_replenish - Move all used packet from rx_used to rx_free
4371 *
4372 * When moving to rx_free an SKB is allocated for the slot.
4373 *
4374 * Also restock the Rx queue via iwl_rx_queue_restock.
4375 * This is called as a scheduled work item (except for during initialization)
4376 */
4377 void iwl_rx_replenish(void *data)
4378 {
4379 struct iwl_priv *priv = data;
4380 struct iwl_rx_queue *rxq = &priv->rxq;
4381 struct list_head *element;
4382 struct iwl_rx_mem_buffer *rxb;
4383 unsigned long flags;
4384 spin_lock_irqsave(&rxq->lock, flags);
4385 while (!list_empty(&rxq->rx_used)) {
4386 element = rxq->rx_used.next;
4387 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4388 rxb->skb =
4389 alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4390 if (!rxb->skb) {
4391 if (net_ratelimit())
4392 printk(KERN_CRIT DRV_NAME
4393 ": Can not allocate SKB buffers\n");
4394 /* We don't reschedule replenish work here -- we will
4395 * call the restock method and if it still needs
4396 * more buffers it will schedule replenish */
4397 break;
4398 }
4399 priv->alloc_rxb_skb++;
4400 list_del(element);
4401 rxb->dma_addr =
4402 pci_map_single(priv->pci_dev, rxb->skb->data,
4403 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4404 list_add_tail(&rxb->list, &rxq->rx_free);
4405 rxq->free_count++;
4406 }
4407 spin_unlock_irqrestore(&rxq->lock, flags);
4408
4409 spin_lock_irqsave(&priv->lock, flags);
4410 iwl_rx_queue_restock(priv);
4411 spin_unlock_irqrestore(&priv->lock, flags);
4412 }
4413
4414 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4415 * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4416 * This free routine walks the list of POOL entries and if SKB is set to
4417 * non NULL it is unmapped and freed
4418 */
4419 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4420 {
4421 int i;
4422 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4423 if (rxq->pool[i].skb != NULL) {
4424 pci_unmap_single(priv->pci_dev,
4425 rxq->pool[i].dma_addr,
4426 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4427 dev_kfree_skb(rxq->pool[i].skb);
4428 }
4429 }
4430
4431 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4432 rxq->dma_addr);
4433 rxq->bd = NULL;
4434 }
4435
4436 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4437 {
4438 struct iwl_rx_queue *rxq = &priv->rxq;
4439 struct pci_dev *dev = priv->pci_dev;
4440 int i;
4441
4442 spin_lock_init(&rxq->lock);
4443 INIT_LIST_HEAD(&rxq->rx_free);
4444 INIT_LIST_HEAD(&rxq->rx_used);
4445 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4446 if (!rxq->bd)
4447 return -ENOMEM;
4448 /* Fill the rx_used queue with _all_ of the Rx buffers */
4449 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4450 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4451 /* Set us so that we have processed and used all buffers, but have
4452 * not restocked the Rx queue with fresh buffers */
4453 rxq->read = rxq->write = 0;
4454 rxq->free_count = 0;
4455 rxq->need_update = 0;
4456 return 0;
4457 }
4458
4459 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4460 {
4461 unsigned long flags;
4462 int i;
4463 spin_lock_irqsave(&rxq->lock, flags);
4464 INIT_LIST_HEAD(&rxq->rx_free);
4465 INIT_LIST_HEAD(&rxq->rx_used);
4466 /* Fill the rx_used queue with _all_ of the Rx buffers */
4467 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4468 /* In the reset function, these buffers may have been allocated
4469 * to an SKB, so we need to unmap and free potential storage */
4470 if (rxq->pool[i].skb != NULL) {
4471 pci_unmap_single(priv->pci_dev,
4472 rxq->pool[i].dma_addr,
4473 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4474 priv->alloc_rxb_skb--;
4475 dev_kfree_skb(rxq->pool[i].skb);
4476 rxq->pool[i].skb = NULL;
4477 }
4478 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4479 }
4480
4481 /* Set us so that we have processed and used all buffers, but have
4482 * not restocked the Rx queue with fresh buffers */
4483 rxq->read = rxq->write = 0;
4484 rxq->free_count = 0;
4485 spin_unlock_irqrestore(&rxq->lock, flags);
4486 }
4487
4488 /* Convert linear signal-to-noise ratio into dB */
4489 static u8 ratio2dB[100] = {
4490 /* 0 1 2 3 4 5 6 7 8 9 */
4491 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4492 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4493 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4494 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4495 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4496 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4497 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4498 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4499 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4500 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4501 };
4502
4503 /* Calculates a relative dB value from a ratio of linear
4504 * (i.e. not dB) signal levels.
4505 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4506 int iwl_calc_db_from_ratio(int sig_ratio)
4507 {
4508 /* 1000:1 or higher just report as 60 dB */
4509 if (sig_ratio >= 1000)
4510 return 60;
4511
4512 /* 100:1 or higher, divide by 10 and use table,
4513 * add 20 dB to make up for divide by 10 */
4514 if (sig_ratio >= 100)
4515 return (20 + (int)ratio2dB[sig_ratio/10]);
4516
4517 /* We shouldn't see this */
4518 if (sig_ratio < 1)
4519 return 0;
4520
4521 /* Use table for ratios 1:1 - 99:1 */
4522 return (int)ratio2dB[sig_ratio];
4523 }
4524
4525 #define PERFECT_RSSI (-20) /* dBm */
4526 #define WORST_RSSI (-95) /* dBm */
4527 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4528
4529 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4530 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4531 * about formulas used below. */
4532 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4533 {
4534 int sig_qual;
4535 int degradation = PERFECT_RSSI - rssi_dbm;
4536
4537 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4538 * as indicator; formula is (signal dbm - noise dbm).
4539 * SNR at or above 40 is a great signal (100%).
4540 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4541 * Weakest usable signal is usually 10 - 15 dB SNR. */
4542 if (noise_dbm) {
4543 if (rssi_dbm - noise_dbm >= 40)
4544 return 100;
4545 else if (rssi_dbm < noise_dbm)
4546 return 0;
4547 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4548
4549 /* Else use just the signal level.
4550 * This formula is a least squares fit of data points collected and
4551 * compared with a reference system that had a percentage (%) display
4552 * for signal quality. */
4553 } else
4554 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4555 (15 * RSSI_RANGE + 62 * degradation)) /
4556 (RSSI_RANGE * RSSI_RANGE);
4557
4558 if (sig_qual > 100)
4559 sig_qual = 100;
4560 else if (sig_qual < 1)
4561 sig_qual = 0;
4562
4563 return sig_qual;
4564 }
4565
4566 /**
4567 * iwl_rx_handle - Main entry function for receiving responses from the uCode
4568 *
4569 * Uses the priv->rx_handlers callback function array to invoke
4570 * the appropriate handlers, including command responses,
4571 * frame-received notifications, and other notifications.
4572 */
4573 static void iwl_rx_handle(struct iwl_priv *priv)
4574 {
4575 struct iwl_rx_mem_buffer *rxb;
4576 struct iwl_rx_packet *pkt;
4577 struct iwl_rx_queue *rxq = &priv->rxq;
4578 u32 r, i;
4579 int reclaim;
4580 unsigned long flags;
4581
4582 r = iwl_hw_get_rx_read(priv);
4583 i = rxq->read;
4584
4585 /* Rx interrupt, but nothing sent from uCode */
4586 if (i == r)
4587 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4588
4589 while (i != r) {
4590 rxb = rxq->queue[i];
4591
4592 /* If an RXB doesn't have a queue slot associated with it
4593 * then a bug has been introduced in the queue refilling
4594 * routines -- catch it here */
4595 BUG_ON(rxb == NULL);
4596
4597 rxq->queue[i] = NULL;
4598
4599 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4600 IWL_RX_BUF_SIZE,
4601 PCI_DMA_FROMDEVICE);
4602 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4603
4604 /* Reclaim a command buffer only if this packet is a response
4605 * to a (driver-originated) command.
4606 * If the packet (e.g. Rx frame) originated from uCode,
4607 * there is no command buffer to reclaim.
4608 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4609 * but apparently a few don't get set; catch them here. */
4610 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4611 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4612 (pkt->hdr.cmd != REPLY_4965_RX) &&
4613 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4614 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4615 (pkt->hdr.cmd != REPLY_TX);
4616
4617 /* Based on type of command response or notification,
4618 * handle those that need handling via function in
4619 * rx_handlers table. See iwl_setup_rx_handlers() */
4620 if (priv->rx_handlers[pkt->hdr.cmd]) {
4621 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4622 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4623 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4624 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4625 } else {
4626 /* No handling needed */
4627 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4628 "r %d i %d No handler needed for %s, 0x%02x\n",
4629 r, i, get_cmd_string(pkt->hdr.cmd),
4630 pkt->hdr.cmd);
4631 }
4632
4633 if (reclaim) {
4634 /* Invoke any callbacks, transfer the skb to caller,
4635 * and fire off the (possibly) blocking iwl_send_cmd()
4636 * as we reclaim the driver command queue */
4637 if (rxb && rxb->skb)
4638 iwl_tx_cmd_complete(priv, rxb);
4639 else
4640 IWL_WARNING("Claim null rxb?\n");
4641 }
4642
4643 /* For now we just don't re-use anything. We can tweak this
4644 * later to try and re-use notification packets and SKBs that
4645 * fail to Rx correctly */
4646 if (rxb->skb != NULL) {
4647 priv->alloc_rxb_skb--;
4648 dev_kfree_skb_any(rxb->skb);
4649 rxb->skb = NULL;
4650 }
4651
4652 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4653 IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4654 spin_lock_irqsave(&rxq->lock, flags);
4655 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4656 spin_unlock_irqrestore(&rxq->lock, flags);
4657 i = (i + 1) & RX_QUEUE_MASK;
4658 }
4659
4660 /* Backtrack one entry */
4661 priv->rxq.read = i;
4662 iwl_rx_queue_restock(priv);
4663 }
4664
4665 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4666 struct iwl_tx_queue *txq)
4667 {
4668 u32 reg = 0;
4669 int rc = 0;
4670 int txq_id = txq->q.id;
4671
4672 if (txq->need_update == 0)
4673 return rc;
4674
4675 /* if we're trying to save power */
4676 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4677 /* wake up nic if it's powered down ...
4678 * uCode will wake up, and interrupt us again, so next
4679 * time we'll skip this part. */
4680 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4681
4682 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4683 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4684 iwl_set_bit(priv, CSR_GP_CNTRL,
4685 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4686 return rc;
4687 }
4688
4689 /* restore this queue's parameters in nic hardware. */
4690 rc = iwl_grab_restricted_access(priv);
4691 if (rc)
4692 return rc;
4693 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4694 txq->q.write_ptr | (txq_id << 8));
4695 iwl_release_restricted_access(priv);
4696
4697 /* else not in power-save mode, uCode will never sleep when we're
4698 * trying to tx (during RFKILL, we're not trying to tx). */
4699 } else
4700 iwl_write32(priv, HBUS_TARG_WRPTR,
4701 txq->q.write_ptr | (txq_id << 8));
4702
4703 txq->need_update = 0;
4704
4705 return rc;
4706 }
4707
4708 #ifdef CONFIG_IWLWIFI_DEBUG
4709 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4710 {
4711 DECLARE_MAC_BUF(mac);
4712
4713 IWL_DEBUG_RADIO("RX CONFIG:\n");
4714 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4715 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4716 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4717 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4718 le32_to_cpu(rxon->filter_flags));
4719 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4720 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4721 rxon->ofdm_basic_rates);
4722 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4723 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4724 print_mac(mac, rxon->node_addr));
4725 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4726 print_mac(mac, rxon->bssid_addr));
4727 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4728 }
4729 #endif
4730
4731 static void iwl_enable_interrupts(struct iwl_priv *priv)
4732 {
4733 IWL_DEBUG_ISR("Enabling interrupts\n");
4734 set_bit(STATUS_INT_ENABLED, &priv->status);
4735 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4736 }
4737
4738 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4739 {
4740 clear_bit(STATUS_INT_ENABLED, &priv->status);
4741
4742 /* disable interrupts from uCode/NIC to host */
4743 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4744
4745 /* acknowledge/clear/reset any interrupts still pending
4746 * from uCode or flow handler (Rx/Tx DMA) */
4747 iwl_write32(priv, CSR_INT, 0xffffffff);
4748 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4749 IWL_DEBUG_ISR("Disabled interrupts\n");
4750 }
4751
4752 static const char *desc_lookup(int i)
4753 {
4754 switch (i) {
4755 case 1:
4756 return "FAIL";
4757 case 2:
4758 return "BAD_PARAM";
4759 case 3:
4760 return "BAD_CHECKSUM";
4761 case 4:
4762 return "NMI_INTERRUPT";
4763 case 5:
4764 return "SYSASSERT";
4765 case 6:
4766 return "FATAL_ERROR";
4767 }
4768
4769 return "UNKNOWN";
4770 }
4771
4772 #define ERROR_START_OFFSET (1 * sizeof(u32))
4773 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4774
4775 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4776 {
4777 u32 data2, line;
4778 u32 desc, time, count, base, data1;
4779 u32 blink1, blink2, ilink1, ilink2;
4780 int rc;
4781
4782 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4783
4784 if (!iwl_hw_valid_rtc_data_addr(base)) {
4785 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4786 return;
4787 }
4788
4789 rc = iwl_grab_restricted_access(priv);
4790 if (rc) {
4791 IWL_WARNING("Can not read from adapter at this time.\n");
4792 return;
4793 }
4794
4795 count = iwl_read_restricted_mem(priv, base);
4796
4797 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4798 IWL_ERROR("Start IWL Error Log Dump:\n");
4799 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4800 priv->status, priv->config, count);
4801 }
4802
4803 desc = iwl_read_restricted_mem(priv, base + 1 * sizeof(u32));
4804 blink1 = iwl_read_restricted_mem(priv, base + 3 * sizeof(u32));
4805 blink2 = iwl_read_restricted_mem(priv, base + 4 * sizeof(u32));
4806 ilink1 = iwl_read_restricted_mem(priv, base + 5 * sizeof(u32));
4807 ilink2 = iwl_read_restricted_mem(priv, base + 6 * sizeof(u32));
4808 data1 = iwl_read_restricted_mem(priv, base + 7 * sizeof(u32));
4809 data2 = iwl_read_restricted_mem(priv, base + 8 * sizeof(u32));
4810 line = iwl_read_restricted_mem(priv, base + 9 * sizeof(u32));
4811 time = iwl_read_restricted_mem(priv, base + 11 * sizeof(u32));
4812
4813 IWL_ERROR("Desc Time "
4814 "data1 data2 line\n");
4815 IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4816 desc_lookup(desc), desc, time, data1, data2, line);
4817 IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
4818 IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4819 ilink1, ilink2);
4820
4821 iwl_release_restricted_access(priv);
4822 }
4823
4824 #define EVENT_START_OFFSET (4 * sizeof(u32))
4825
4826 /**
4827 * iwl_print_event_log - Dump error event log to syslog
4828 *
4829 * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4830 */
4831 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4832 u32 num_events, u32 mode)
4833 {
4834 u32 i;
4835 u32 base; /* SRAM byte address of event log header */
4836 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4837 u32 ptr; /* SRAM byte address of log data */
4838 u32 ev, time, data; /* event log data */
4839
4840 if (num_events == 0)
4841 return;
4842
4843 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4844
4845 if (mode == 0)
4846 event_size = 2 * sizeof(u32);
4847 else
4848 event_size = 3 * sizeof(u32);
4849
4850 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4851
4852 /* "time" is actually "data" for mode 0 (no timestamp).
4853 * place event id # at far right for easier visual parsing. */
4854 for (i = 0; i < num_events; i++) {
4855 ev = iwl_read_restricted_mem(priv, ptr);
4856 ptr += sizeof(u32);
4857 time = iwl_read_restricted_mem(priv, ptr);
4858 ptr += sizeof(u32);
4859 if (mode == 0)
4860 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4861 else {
4862 data = iwl_read_restricted_mem(priv, ptr);
4863 ptr += sizeof(u32);
4864 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4865 }
4866 }
4867 }
4868
4869 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4870 {
4871 int rc;
4872 u32 base; /* SRAM byte address of event log header */
4873 u32 capacity; /* event log capacity in # entries */
4874 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4875 u32 num_wraps; /* # times uCode wrapped to top of log */
4876 u32 next_entry; /* index of next entry to be written by uCode */
4877 u32 size; /* # entries that we'll print */
4878
4879 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4880 if (!iwl_hw_valid_rtc_data_addr(base)) {
4881 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4882 return;
4883 }
4884
4885 rc = iwl_grab_restricted_access(priv);
4886 if (rc) {
4887 IWL_WARNING("Can not read from adapter at this time.\n");
4888 return;
4889 }
4890
4891 /* event log header */
4892 capacity = iwl_read_restricted_mem(priv, base);
4893 mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4894 num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4895 next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4896
4897 size = num_wraps ? capacity : next_entry;
4898
4899 /* bail out if nothing in log */
4900 if (size == 0) {
4901 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4902 iwl_release_restricted_access(priv);
4903 return;
4904 }
4905
4906 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4907 size, num_wraps);
4908
4909 /* if uCode has wrapped back to top of log, start at the oldest entry,
4910 * i.e the next one that uCode would fill. */
4911 if (num_wraps)
4912 iwl_print_event_log(priv, next_entry,
4913 capacity - next_entry, mode);
4914
4915 /* (then/else) start at top of log */
4916 iwl_print_event_log(priv, 0, next_entry, mode);
4917
4918 iwl_release_restricted_access(priv);
4919 }
4920
4921 /**
4922 * iwl_irq_handle_error - called for HW or SW error interrupt from card
4923 */
4924 static void iwl_irq_handle_error(struct iwl_priv *priv)
4925 {
4926 /* Set the FW error flag -- cleared on iwl_down */
4927 set_bit(STATUS_FW_ERROR, &priv->status);
4928
4929 /* Cancel currently queued command. */
4930 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4931
4932 #ifdef CONFIG_IWLWIFI_DEBUG
4933 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4934 iwl_dump_nic_error_log(priv);
4935 iwl_dump_nic_event_log(priv);
4936 iwl_print_rx_config_cmd(&priv->staging_rxon);
4937 }
4938 #endif
4939
4940 wake_up_interruptible(&priv->wait_command_queue);
4941
4942 /* Keep the restart process from trying to send host
4943 * commands by clearing the INIT status bit */
4944 clear_bit(STATUS_READY, &priv->status);
4945
4946 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4947 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4948 "Restarting adapter due to uCode error.\n");
4949
4950 if (iwl_is_associated(priv)) {
4951 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4952 sizeof(priv->recovery_rxon));
4953 priv->error_recovering = 1;
4954 }
4955 queue_work(priv->workqueue, &priv->restart);
4956 }
4957 }
4958
4959 static void iwl_error_recovery(struct iwl_priv *priv)
4960 {
4961 unsigned long flags;
4962
4963 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4964 sizeof(priv->staging_rxon));
4965 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4966 iwl_commit_rxon(priv);
4967
4968 iwl_rxon_add_station(priv, priv->bssid, 1);
4969
4970 spin_lock_irqsave(&priv->lock, flags);
4971 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4972 priv->error_recovering = 0;
4973 spin_unlock_irqrestore(&priv->lock, flags);
4974 }
4975
4976 static void iwl_irq_tasklet(struct iwl_priv *priv)
4977 {
4978 u32 inta, handled = 0;
4979 u32 inta_fh;
4980 unsigned long flags;
4981 #ifdef CONFIG_IWLWIFI_DEBUG
4982 u32 inta_mask;
4983 #endif
4984
4985 spin_lock_irqsave(&priv->lock, flags);
4986
4987 /* Ack/clear/reset pending uCode interrupts.
4988 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4989 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4990 inta = iwl_read32(priv, CSR_INT);
4991 iwl_write32(priv, CSR_INT, inta);
4992
4993 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4994 * Any new interrupts that happen after this, either while we're
4995 * in this tasklet, or later, will show up in next ISR/tasklet. */
4996 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4997 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4998
4999 #ifdef CONFIG_IWLWIFI_DEBUG
5000 if (iwl_debug_level & IWL_DL_ISR) {
5001 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
5002 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5003 inta, inta_mask, inta_fh);
5004 }
5005 #endif
5006
5007 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5008 * atomic, make sure that inta covers all the interrupts that
5009 * we've discovered, even if FH interrupt came in just after
5010 * reading CSR_INT. */
5011 if (inta_fh & CSR_FH_INT_RX_MASK)
5012 inta |= CSR_INT_BIT_FH_RX;
5013 if (inta_fh & CSR_FH_INT_TX_MASK)
5014 inta |= CSR_INT_BIT_FH_TX;
5015
5016 /* Now service all interrupt bits discovered above. */
5017 if (inta & CSR_INT_BIT_HW_ERR) {
5018 IWL_ERROR("Microcode HW error detected. Restarting.\n");
5019
5020 /* Tell the device to stop sending interrupts */
5021 iwl_disable_interrupts(priv);
5022
5023 iwl_irq_handle_error(priv);
5024
5025 handled |= CSR_INT_BIT_HW_ERR;
5026
5027 spin_unlock_irqrestore(&priv->lock, flags);
5028
5029 return;
5030 }
5031
5032 #ifdef CONFIG_IWLWIFI_DEBUG
5033 if (iwl_debug_level & (IWL_DL_ISR)) {
5034 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5035 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
5036 IWL_DEBUG_ISR("Microcode started or stopped.\n");
5037
5038 /* Alive notification via Rx interrupt will do the real work */
5039 if (inta & CSR_INT_BIT_ALIVE)
5040 IWL_DEBUG_ISR("Alive interrupt\n");
5041 }
5042 #endif
5043 /* Safely ignore these bits for debug checks below */
5044 inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
5045
5046 /* HW RF KILL switch toggled (4965 only) */
5047 if (inta & CSR_INT_BIT_RF_KILL) {
5048 int hw_rf_kill = 0;
5049 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
5050 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5051 hw_rf_kill = 1;
5052
5053 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5054 "RF_KILL bit toggled to %s.\n",
5055 hw_rf_kill ? "disable radio":"enable radio");
5056
5057 /* Queue restart only if RF_KILL switch was set to "kill"
5058 * when we loaded driver, and is now set to "enable".
5059 * After we're Alive, RF_KILL gets handled by
5060 * iwl_rx_card_state_notif() */
5061 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
5062 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5063 queue_work(priv->workqueue, &priv->restart);
5064 }
5065
5066 handled |= CSR_INT_BIT_RF_KILL;
5067 }
5068
5069 /* Chip got too hot and stopped itself (4965 only) */
5070 if (inta & CSR_INT_BIT_CT_KILL) {
5071 IWL_ERROR("Microcode CT kill error detected.\n");
5072 handled |= CSR_INT_BIT_CT_KILL;
5073 }
5074
5075 /* Error detected by uCode */
5076 if (inta & CSR_INT_BIT_SW_ERR) {
5077 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
5078 inta);
5079 iwl_irq_handle_error(priv);
5080 handled |= CSR_INT_BIT_SW_ERR;
5081 }
5082
5083 /* uCode wakes up after power-down sleep */
5084 if (inta & CSR_INT_BIT_WAKEUP) {
5085 IWL_DEBUG_ISR("Wakeup interrupt\n");
5086 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
5087 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5088 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5089 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5090 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5091 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5092 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5093
5094 handled |= CSR_INT_BIT_WAKEUP;
5095 }
5096
5097 /* All uCode command responses, including Tx command responses,
5098 * Rx "responses" (frame-received notification), and other
5099 * notifications from uCode come through here*/
5100 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5101 iwl_rx_handle(priv);
5102 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5103 }
5104
5105 if (inta & CSR_INT_BIT_FH_TX) {
5106 IWL_DEBUG_ISR("Tx interrupt\n");
5107 handled |= CSR_INT_BIT_FH_TX;
5108 }
5109
5110 if (inta & ~handled)
5111 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5112
5113 if (inta & ~CSR_INI_SET_MASK) {
5114 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5115 inta & ~CSR_INI_SET_MASK);
5116 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
5117 }
5118
5119 /* Re-enable all interrupts */
5120 iwl_enable_interrupts(priv);
5121
5122 #ifdef CONFIG_IWLWIFI_DEBUG
5123 if (iwl_debug_level & (IWL_DL_ISR)) {
5124 inta = iwl_read32(priv, CSR_INT);
5125 inta_mask = iwl_read32(priv, CSR_INT_MASK);
5126 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5127 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5128 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5129 }
5130 #endif
5131 spin_unlock_irqrestore(&priv->lock, flags);
5132 }
5133
5134 static irqreturn_t iwl_isr(int irq, void *data)
5135 {
5136 struct iwl_priv *priv = data;
5137 u32 inta, inta_mask;
5138 u32 inta_fh;
5139 if (!priv)
5140 return IRQ_NONE;
5141
5142 spin_lock(&priv->lock);
5143
5144 /* Disable (but don't clear!) interrupts here to avoid
5145 * back-to-back ISRs and sporadic interrupts from our NIC.
5146 * If we have something to service, the tasklet will re-enable ints.
5147 * If we *don't* have something, we'll re-enable before leaving here. */
5148 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
5149 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
5150
5151 /* Discover which interrupts are active/pending */
5152 inta = iwl_read32(priv, CSR_INT);
5153 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5154
5155 /* Ignore interrupt if there's nothing in NIC to service.
5156 * This may be due to IRQ shared with another device,
5157 * or due to sporadic interrupts thrown from our NIC. */
5158 if (!inta && !inta_fh) {
5159 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5160 goto none;
5161 }
5162
5163 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5164 /* Hardware disappeared. It might have already raised
5165 * an interrupt */
5166 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5167 goto unplugged;
5168 }
5169
5170 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5171 inta, inta_mask, inta_fh);
5172
5173 /* iwl_irq_tasklet() will service interrupts and re-enable them */
5174 tasklet_schedule(&priv->irq_tasklet);
5175
5176 unplugged:
5177 spin_unlock(&priv->lock);
5178 return IRQ_HANDLED;
5179
5180 none:
5181 /* re-enable interrupts here since we don't have anything to service. */
5182 iwl_enable_interrupts(priv);
5183 spin_unlock(&priv->lock);
5184 return IRQ_NONE;
5185 }
5186
5187 /************************** EEPROM BANDS ****************************
5188 *
5189 * The iwl_eeprom_band definitions below provide the mapping from the
5190 * EEPROM contents to the specific channel number supported for each
5191 * band.
5192 *
5193 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
5194 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5195 * The specific geography and calibration information for that channel
5196 * is contained in the eeprom map itself.
5197 *
5198 * During init, we copy the eeprom information and channel map
5199 * information into priv->channel_info_24/52 and priv->channel_map_24/52
5200 *
5201 * channel_map_24/52 provides the index in the channel_info array for a
5202 * given channel. We have to have two separate maps as there is channel
5203 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5204 * band_2
5205 *
5206 * A value of 0xff stored in the channel_map indicates that the channel
5207 * is not supported by the hardware at all.
5208 *
5209 * A value of 0xfe in the channel_map indicates that the channel is not
5210 * valid for Tx with the current hardware. This means that
5211 * while the system can tune and receive on a given channel, it may not
5212 * be able to associate or transmit any frames on that
5213 * channel. There is no corresponding channel information for that
5214 * entry.
5215 *
5216 *********************************************************************/
5217
5218 /* 2.4 GHz */
5219 static const u8 iwl_eeprom_band_1[14] = {
5220 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5221 };
5222
5223 /* 5.2 GHz bands */
5224 static const u8 iwl_eeprom_band_2[] = {
5225 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5226 };
5227
5228 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
5229 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5230 };
5231
5232 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
5233 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5234 };
5235
5236 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
5237 145, 149, 153, 157, 161, 165
5238 };
5239
5240 static u8 iwl_eeprom_band_6[] = { /* 2.4 FAT channel */
5241 1, 2, 3, 4, 5, 6, 7
5242 };
5243
5244 static u8 iwl_eeprom_band_7[] = { /* 5.2 FAT channel */
5245 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5246 };
5247
5248 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
5249 int *eeprom_ch_count,
5250 const struct iwl_eeprom_channel
5251 **eeprom_ch_info,
5252 const u8 **eeprom_ch_index)
5253 {
5254 switch (band) {
5255 case 1: /* 2.4GHz band */
5256 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
5257 *eeprom_ch_info = priv->eeprom.band_1_channels;
5258 *eeprom_ch_index = iwl_eeprom_band_1;
5259 break;
5260 case 2: /* 5.2GHz band */
5261 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
5262 *eeprom_ch_info = priv->eeprom.band_2_channels;
5263 *eeprom_ch_index = iwl_eeprom_band_2;
5264 break;
5265 case 3: /* 5.2GHz band */
5266 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
5267 *eeprom_ch_info = priv->eeprom.band_3_channels;
5268 *eeprom_ch_index = iwl_eeprom_band_3;
5269 break;
5270 case 4: /* 5.2GHz band */
5271 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
5272 *eeprom_ch_info = priv->eeprom.band_4_channels;
5273 *eeprom_ch_index = iwl_eeprom_band_4;
5274 break;
5275 case 5: /* 5.2GHz band */
5276 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
5277 *eeprom_ch_info = priv->eeprom.band_5_channels;
5278 *eeprom_ch_index = iwl_eeprom_band_5;
5279 break;
5280 case 6:
5281 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
5282 *eeprom_ch_info = priv->eeprom.band_24_channels;
5283 *eeprom_ch_index = iwl_eeprom_band_6;
5284 break;
5285 case 7:
5286 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
5287 *eeprom_ch_info = priv->eeprom.band_52_channels;
5288 *eeprom_ch_index = iwl_eeprom_band_7;
5289 break;
5290 default:
5291 BUG();
5292 return;
5293 }
5294 }
5295
5296 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
5297 int phymode, u16 channel)
5298 {
5299 int i;
5300
5301 switch (phymode) {
5302 case MODE_IEEE80211A:
5303 for (i = 14; i < priv->channel_count; i++) {
5304 if (priv->channel_info[i].channel == channel)
5305 return &priv->channel_info[i];
5306 }
5307 break;
5308
5309 case MODE_IEEE80211B:
5310 case MODE_IEEE80211G:
5311 if (channel >= 1 && channel <= 14)
5312 return &priv->channel_info[channel - 1];
5313 break;
5314
5315 }
5316
5317 return NULL;
5318 }
5319
5320 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5321 ? # x " " : "")
5322
5323 static int iwl_init_channel_map(struct iwl_priv *priv)
5324 {
5325 int eeprom_ch_count = 0;
5326 const u8 *eeprom_ch_index = NULL;
5327 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
5328 int band, ch;
5329 struct iwl_channel_info *ch_info;
5330
5331 if (priv->channel_count) {
5332 IWL_DEBUG_INFO("Channel map already initialized.\n");
5333 return 0;
5334 }
5335
5336 if (priv->eeprom.version < 0x2f) {
5337 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5338 priv->eeprom.version);
5339 return -EINVAL;
5340 }
5341
5342 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5343
5344 priv->channel_count =
5345 ARRAY_SIZE(iwl_eeprom_band_1) +
5346 ARRAY_SIZE(iwl_eeprom_band_2) +
5347 ARRAY_SIZE(iwl_eeprom_band_3) +
5348 ARRAY_SIZE(iwl_eeprom_band_4) +
5349 ARRAY_SIZE(iwl_eeprom_band_5);
5350
5351 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5352
5353 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5354 priv->channel_count, GFP_KERNEL);
5355 if (!priv->channel_info) {
5356 IWL_ERROR("Could not allocate channel_info\n");
5357 priv->channel_count = 0;
5358 return -ENOMEM;
5359 }
5360
5361 ch_info = priv->channel_info;
5362
5363 /* Loop through the 5 EEPROM bands adding them in order to the
5364 * channel map we maintain (that contains additional information than
5365 * what just in the EEPROM) */
5366 for (band = 1; band <= 5; band++) {
5367
5368 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5369 &eeprom_ch_info, &eeprom_ch_index);
5370
5371 /* Loop through each band adding each of the channels */
5372 for (ch = 0; ch < eeprom_ch_count; ch++) {
5373 ch_info->channel = eeprom_ch_index[ch];
5374 ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5375 MODE_IEEE80211A;
5376
5377 /* permanently store EEPROM's channel regulatory flags
5378 * and max power in channel info database. */
5379 ch_info->eeprom = eeprom_ch_info[ch];
5380
5381 /* Copy the run-time flags so they are there even on
5382 * invalid channels */
5383 ch_info->flags = eeprom_ch_info[ch].flags;
5384
5385 if (!(is_channel_valid(ch_info))) {
5386 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5387 "No traffic\n",
5388 ch_info->channel,
5389 ch_info->flags,
5390 is_channel_a_band(ch_info) ?
5391 "5.2" : "2.4");
5392 ch_info++;
5393 continue;
5394 }
5395
5396 /* Initialize regulatory-based run-time data */
5397 ch_info->max_power_avg = ch_info->curr_txpow =
5398 eeprom_ch_info[ch].max_power_avg;
5399 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5400 ch_info->min_power = 0;
5401
5402 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5403 " %ddBm): Ad-Hoc %ssupported\n",
5404 ch_info->channel,
5405 is_channel_a_band(ch_info) ?
5406 "5.2" : "2.4",
5407 CHECK_AND_PRINT(IBSS),
5408 CHECK_AND_PRINT(ACTIVE),
5409 CHECK_AND_PRINT(RADAR),
5410 CHECK_AND_PRINT(WIDE),
5411 CHECK_AND_PRINT(NARROW),
5412 CHECK_AND_PRINT(DFS),
5413 eeprom_ch_info[ch].flags,
5414 eeprom_ch_info[ch].max_power_avg,
5415 ((eeprom_ch_info[ch].
5416 flags & EEPROM_CHANNEL_IBSS)
5417 && !(eeprom_ch_info[ch].
5418 flags & EEPROM_CHANNEL_RADAR))
5419 ? "" : "not ");
5420
5421 /* Set the user_txpower_limit to the highest power
5422 * supported by any channel */
5423 if (eeprom_ch_info[ch].max_power_avg >
5424 priv->user_txpower_limit)
5425 priv->user_txpower_limit =
5426 eeprom_ch_info[ch].max_power_avg;
5427
5428 ch_info++;
5429 }
5430 }
5431
5432 for (band = 6; band <= 7; band++) {
5433 int phymode;
5434 u8 fat_extension_chan;
5435
5436 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5437 &eeprom_ch_info, &eeprom_ch_index);
5438
5439 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5440 /* Loop through each band adding each of the channels */
5441 for (ch = 0; ch < eeprom_ch_count; ch++) {
5442
5443 if ((band == 6) &&
5444 ((eeprom_ch_index[ch] == 5) ||
5445 (eeprom_ch_index[ch] == 6) ||
5446 (eeprom_ch_index[ch] == 7)))
5447 fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5448 else
5449 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5450
5451 iwl4965_set_fat_chan_info(priv, phymode,
5452 eeprom_ch_index[ch],
5453 &(eeprom_ch_info[ch]),
5454 fat_extension_chan);
5455
5456 iwl4965_set_fat_chan_info(priv, phymode,
5457 (eeprom_ch_index[ch] + 4),
5458 &(eeprom_ch_info[ch]),
5459 HT_IE_EXT_CHANNEL_BELOW);
5460 }
5461 }
5462
5463 return 0;
5464 }
5465
5466 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5467 * sending probe req. This should be set long enough to hear probe responses
5468 * from more than one AP. */
5469 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
5470 #define IWL_ACTIVE_DWELL_TIME_52 (10)
5471
5472 /* For faster active scanning, scan will move to the next channel if fewer than
5473 * PLCP_QUIET_THRESH packets are heard on this channel within
5474 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
5475 * time if it's a quiet channel (nothing responded to our probe, and there's
5476 * no other traffic).
5477 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5478 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
5479 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
5480
5481 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5482 * Must be set longer than active dwell time.
5483 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5484 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
5485 #define IWL_PASSIVE_DWELL_TIME_52 (10)
5486 #define IWL_PASSIVE_DWELL_BASE (100)
5487 #define IWL_CHANNEL_TUNE_TIME 5
5488
5489 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5490 {
5491 if (phymode == MODE_IEEE80211A)
5492 return IWL_ACTIVE_DWELL_TIME_52;
5493 else
5494 return IWL_ACTIVE_DWELL_TIME_24;
5495 }
5496
5497 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5498 {
5499 u16 active = iwl_get_active_dwell_time(priv, phymode);
5500 u16 passive = (phymode != MODE_IEEE80211A) ?
5501 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5502 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5503
5504 if (iwl_is_associated(priv)) {
5505 /* If we're associated, we clamp the maximum passive
5506 * dwell time to be 98% of the beacon interval (minus
5507 * 2 * channel tune time) */
5508 passive = priv->beacon_int;
5509 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5510 passive = IWL_PASSIVE_DWELL_BASE;
5511 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5512 }
5513
5514 if (passive <= active)
5515 passive = active + 1;
5516
5517 return passive;
5518 }
5519
5520 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5521 u8 is_active, u8 direct_mask,
5522 struct iwl_scan_channel *scan_ch)
5523 {
5524 const struct ieee80211_channel *channels = NULL;
5525 const struct ieee80211_hw_mode *hw_mode;
5526 const struct iwl_channel_info *ch_info;
5527 u16 passive_dwell = 0;
5528 u16 active_dwell = 0;
5529 int added, i;
5530
5531 hw_mode = iwl_get_hw_mode(priv, phymode);
5532 if (!hw_mode)
5533 return 0;
5534
5535 channels = hw_mode->channels;
5536
5537 active_dwell = iwl_get_active_dwell_time(priv, phymode);
5538 passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5539
5540 for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5541 if (channels[i].chan ==
5542 le16_to_cpu(priv->active_rxon.channel)) {
5543 if (iwl_is_associated(priv)) {
5544 IWL_DEBUG_SCAN
5545 ("Skipping current channel %d\n",
5546 le16_to_cpu(priv->active_rxon.channel));
5547 continue;
5548 }
5549 } else if (priv->only_active_channel)
5550 continue;
5551
5552 scan_ch->channel = channels[i].chan;
5553
5554 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5555 if (!is_channel_valid(ch_info)) {
5556 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5557 scan_ch->channel);
5558 continue;
5559 }
5560
5561 if (!is_active || is_channel_passive(ch_info) ||
5562 !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5563 scan_ch->type = 0; /* passive */
5564 else
5565 scan_ch->type = 1; /* active */
5566
5567 if (scan_ch->type & 1)
5568 scan_ch->type |= (direct_mask << 1);
5569
5570 if (is_channel_narrow(ch_info))
5571 scan_ch->type |= (1 << 7);
5572
5573 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5574 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5575
5576 /* Set power levels to defaults */
5577 scan_ch->tpc.dsp_atten = 110;
5578 /* scan_pwr_info->tpc.dsp_atten; */
5579
5580 /*scan_pwr_info->tpc.tx_gain; */
5581 if (phymode == MODE_IEEE80211A)
5582 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5583 else {
5584 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5585 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5586 * power level
5587 scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5588 */
5589 }
5590
5591 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5592 scan_ch->channel,
5593 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5594 (scan_ch->type & 1) ?
5595 active_dwell : passive_dwell);
5596
5597 scan_ch++;
5598 added++;
5599 }
5600
5601 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5602 return added;
5603 }
5604
5605 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5606 {
5607 int i, j;
5608 for (i = 0; i < 3; i++) {
5609 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5610 for (j = 0; j < hw_mode->num_channels; j++)
5611 hw_mode->channels[j].flag = hw_mode->channels[j].val;
5612 }
5613 }
5614
5615 static void iwl_init_hw_rates(struct iwl_priv *priv,
5616 struct ieee80211_rate *rates)
5617 {
5618 int i;
5619
5620 for (i = 0; i < IWL_RATE_COUNT; i++) {
5621 rates[i].rate = iwl_rates[i].ieee * 5;
5622 rates[i].val = i; /* Rate scaling will work on indexes */
5623 rates[i].val2 = i;
5624 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5625 /* Only OFDM have the bits-per-symbol set */
5626 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5627 rates[i].flags |= IEEE80211_RATE_OFDM;
5628 else {
5629 /*
5630 * If CCK 1M then set rate flag to CCK else CCK_2
5631 * which is CCK | PREAMBLE2
5632 */
5633 rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5634 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5635 }
5636
5637 /* Set up which ones are basic rates... */
5638 if (IWL_BASIC_RATES_MASK & (1 << i))
5639 rates[i].flags |= IEEE80211_RATE_BASIC;
5640 }
5641
5642 iwl4965_init_hw_rates(priv, rates);
5643 }
5644
5645 /**
5646 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5647 */
5648 static int iwl_init_geos(struct iwl_priv *priv)
5649 {
5650 struct iwl_channel_info *ch;
5651 struct ieee80211_hw_mode *modes;
5652 struct ieee80211_channel *channels;
5653 struct ieee80211_channel *geo_ch;
5654 struct ieee80211_rate *rates;
5655 int i = 0;
5656 enum {
5657 A = 0,
5658 B = 1,
5659 G = 2,
5660 A_11N = 3,
5661 G_11N = 4,
5662 };
5663 int mode_count = 5;
5664
5665 if (priv->modes) {
5666 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5667 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5668 return 0;
5669 }
5670
5671 modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5672 GFP_KERNEL);
5673 if (!modes)
5674 return -ENOMEM;
5675
5676 channels = kzalloc(sizeof(struct ieee80211_channel) *
5677 priv->channel_count, GFP_KERNEL);
5678 if (!channels) {
5679 kfree(modes);
5680 return -ENOMEM;
5681 }
5682
5683 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5684 GFP_KERNEL);
5685 if (!rates) {
5686 kfree(modes);
5687 kfree(channels);
5688 return -ENOMEM;
5689 }
5690
5691 /* 0 = 802.11a
5692 * 1 = 802.11b
5693 * 2 = 802.11g
5694 */
5695
5696 /* 5.2GHz channels start after the 2.4GHz channels */
5697 modes[A].mode = MODE_IEEE80211A;
5698 modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5699 modes[A].rates = rates;
5700 modes[A].num_rates = 8; /* just OFDM */
5701 modes[A].rates = &rates[4];
5702 modes[A].num_channels = 0;
5703
5704 modes[B].mode = MODE_IEEE80211B;
5705 modes[B].channels = channels;
5706 modes[B].rates = rates;
5707 modes[B].num_rates = 4; /* just CCK */
5708 modes[B].num_channels = 0;
5709
5710 modes[G].mode = MODE_IEEE80211G;
5711 modes[G].channels = channels;
5712 modes[G].rates = rates;
5713 modes[G].num_rates = 12; /* OFDM & CCK */
5714 modes[G].num_channels = 0;
5715
5716 modes[G_11N].mode = MODE_IEEE80211G;
5717 modes[G_11N].channels = channels;
5718 modes[G_11N].num_rates = 13; /* OFDM & CCK */
5719 modes[G_11N].rates = rates;
5720 modes[G_11N].num_channels = 0;
5721
5722 modes[A_11N].mode = MODE_IEEE80211A;
5723 modes[A_11N].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5724 modes[A_11N].rates = &rates[4];
5725 modes[A_11N].num_rates = 9; /* just OFDM */
5726 modes[A_11N].num_channels = 0;
5727
5728 priv->ieee_channels = channels;
5729 priv->ieee_rates = rates;
5730
5731 iwl_init_hw_rates(priv, rates);
5732
5733 for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5734 ch = &priv->channel_info[i];
5735
5736 if (!is_channel_valid(ch)) {
5737 IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5738 "skipping.\n",
5739 ch->channel, is_channel_a_band(ch) ?
5740 "5.2" : "2.4");
5741 continue;
5742 }
5743
5744 if (is_channel_a_band(ch)) {
5745 geo_ch = &modes[A].channels[modes[A].num_channels++];
5746 modes[A_11N].num_channels++;
5747 } else {
5748 geo_ch = &modes[B].channels[modes[B].num_channels++];
5749 modes[G].num_channels++;
5750 modes[G_11N].num_channels++;
5751 }
5752
5753 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5754 geo_ch->chan = ch->channel;
5755 geo_ch->power_level = ch->max_power_avg;
5756 geo_ch->antenna_max = 0xff;
5757
5758 if (is_channel_valid(ch)) {
5759 geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5760 if (ch->flags & EEPROM_CHANNEL_IBSS)
5761 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5762
5763 if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5764 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5765
5766 if (ch->flags & EEPROM_CHANNEL_RADAR)
5767 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5768
5769 if (ch->max_power_avg > priv->max_channel_txpower_limit)
5770 priv->max_channel_txpower_limit =
5771 ch->max_power_avg;
5772 }
5773
5774 geo_ch->val = geo_ch->flag;
5775 }
5776
5777 if ((modes[A].num_channels == 0) && priv->is_abg) {
5778 printk(KERN_INFO DRV_NAME
5779 ": Incorrectly detected BG card as ABG. Please send "
5780 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5781 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5782 priv->is_abg = 0;
5783 }
5784
5785 printk(KERN_INFO DRV_NAME
5786 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5787 modes[G].num_channels, modes[A].num_channels);
5788
5789 /*
5790 * NOTE: We register these in preference of order -- the
5791 * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5792 * a phymode based on rates or AP capabilities but seems to
5793 * configure it purely on if the channel being configured
5794 * is supported by a mode -- and the first match is taken
5795 */
5796
5797 if (modes[G].num_channels)
5798 ieee80211_register_hwmode(priv->hw, &modes[G]);
5799 if (modes[B].num_channels)
5800 ieee80211_register_hwmode(priv->hw, &modes[B]);
5801 if (modes[A].num_channels)
5802 ieee80211_register_hwmode(priv->hw, &modes[A]);
5803
5804 priv->modes = modes;
5805 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5806
5807 return 0;
5808 }
5809
5810 /******************************************************************************
5811 *
5812 * uCode download functions
5813 *
5814 ******************************************************************************/
5815
5816 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5817 {
5818 if (priv->ucode_code.v_addr != NULL) {
5819 pci_free_consistent(priv->pci_dev,
5820 priv->ucode_code.len,
5821 priv->ucode_code.v_addr,
5822 priv->ucode_code.p_addr);
5823 priv->ucode_code.v_addr = NULL;
5824 }
5825 if (priv->ucode_data.v_addr != NULL) {
5826 pci_free_consistent(priv->pci_dev,
5827 priv->ucode_data.len,
5828 priv->ucode_data.v_addr,
5829 priv->ucode_data.p_addr);
5830 priv->ucode_data.v_addr = NULL;
5831 }
5832 if (priv->ucode_data_backup.v_addr != NULL) {
5833 pci_free_consistent(priv->pci_dev,
5834 priv->ucode_data_backup.len,
5835 priv->ucode_data_backup.v_addr,
5836 priv->ucode_data_backup.p_addr);
5837 priv->ucode_data_backup.v_addr = NULL;
5838 }
5839 if (priv->ucode_init.v_addr != NULL) {
5840 pci_free_consistent(priv->pci_dev,
5841 priv->ucode_init.len,
5842 priv->ucode_init.v_addr,
5843 priv->ucode_init.p_addr);
5844 priv->ucode_init.v_addr = NULL;
5845 }
5846 if (priv->ucode_init_data.v_addr != NULL) {
5847 pci_free_consistent(priv->pci_dev,
5848 priv->ucode_init_data.len,
5849 priv->ucode_init_data.v_addr,
5850 priv->ucode_init_data.p_addr);
5851 priv->ucode_init_data.v_addr = NULL;
5852 }
5853 if (priv->ucode_boot.v_addr != NULL) {
5854 pci_free_consistent(priv->pci_dev,
5855 priv->ucode_boot.len,
5856 priv->ucode_boot.v_addr,
5857 priv->ucode_boot.p_addr);
5858 priv->ucode_boot.v_addr = NULL;
5859 }
5860 }
5861
5862 /**
5863 * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5864 * looking at all data.
5865 */
5866 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5867 {
5868 u32 val;
5869 u32 save_len = len;
5870 int rc = 0;
5871 u32 errcnt;
5872
5873 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5874
5875 rc = iwl_grab_restricted_access(priv);
5876 if (rc)
5877 return rc;
5878
5879 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5880
5881 errcnt = 0;
5882 for (; len > 0; len -= sizeof(u32), image++) {
5883 /* read data comes through single port, auto-incr addr */
5884 /* NOTE: Use the debugless read so we don't flood kernel log
5885 * if IWL_DL_IO is set */
5886 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5887 if (val != le32_to_cpu(*image)) {
5888 IWL_ERROR("uCode INST section is invalid at "
5889 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5890 save_len - len, val, le32_to_cpu(*image));
5891 rc = -EIO;
5892 errcnt++;
5893 if (errcnt >= 20)
5894 break;
5895 }
5896 }
5897
5898 iwl_release_restricted_access(priv);
5899
5900 if (!errcnt)
5901 IWL_DEBUG_INFO
5902 ("ucode image in INSTRUCTION memory is good\n");
5903
5904 return rc;
5905 }
5906
5907
5908 /**
5909 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5910 * using sample data 100 bytes apart. If these sample points are good,
5911 * it's a pretty good bet that everything between them is good, too.
5912 */
5913 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5914 {
5915 u32 val;
5916 int rc = 0;
5917 u32 errcnt = 0;
5918 u32 i;
5919
5920 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5921
5922 rc = iwl_grab_restricted_access(priv);
5923 if (rc)
5924 return rc;
5925
5926 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5927 /* read data comes through single port, auto-incr addr */
5928 /* NOTE: Use the debugless read so we don't flood kernel log
5929 * if IWL_DL_IO is set */
5930 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5931 i + RTC_INST_LOWER_BOUND);
5932 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5933 if (val != le32_to_cpu(*image)) {
5934 #if 0 /* Enable this if you want to see details */
5935 IWL_ERROR("uCode INST section is invalid at "
5936 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5937 i, val, *image);
5938 #endif
5939 rc = -EIO;
5940 errcnt++;
5941 if (errcnt >= 3)
5942 break;
5943 }
5944 }
5945
5946 iwl_release_restricted_access(priv);
5947
5948 return rc;
5949 }
5950
5951
5952 /**
5953 * iwl_verify_ucode - determine which instruction image is in SRAM,
5954 * and verify its contents
5955 */
5956 static int iwl_verify_ucode(struct iwl_priv *priv)
5957 {
5958 __le32 *image;
5959 u32 len;
5960 int rc = 0;
5961
5962 /* Try bootstrap */
5963 image = (__le32 *)priv->ucode_boot.v_addr;
5964 len = priv->ucode_boot.len;
5965 rc = iwl_verify_inst_sparse(priv, image, len);
5966 if (rc == 0) {
5967 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5968 return 0;
5969 }
5970
5971 /* Try initialize */
5972 image = (__le32 *)priv->ucode_init.v_addr;
5973 len = priv->ucode_init.len;
5974 rc = iwl_verify_inst_sparse(priv, image, len);
5975 if (rc == 0) {
5976 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5977 return 0;
5978 }
5979
5980 /* Try runtime/protocol */
5981 image = (__le32 *)priv->ucode_code.v_addr;
5982 len = priv->ucode_code.len;
5983 rc = iwl_verify_inst_sparse(priv, image, len);
5984 if (rc == 0) {
5985 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5986 return 0;
5987 }
5988
5989 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5990
5991 /* Show first several data entries in instruction SRAM.
5992 * Selection of bootstrap image is arbitrary. */
5993 image = (__le32 *)priv->ucode_boot.v_addr;
5994 len = priv->ucode_boot.len;
5995 rc = iwl_verify_inst_full(priv, image, len);
5996
5997 return rc;
5998 }
5999
6000
6001 /* check contents of special bootstrap uCode SRAM */
6002 static int iwl_verify_bsm(struct iwl_priv *priv)
6003 {
6004 __le32 *image = priv->ucode_boot.v_addr;
6005 u32 len = priv->ucode_boot.len;
6006 u32 reg;
6007 u32 val;
6008
6009 IWL_DEBUG_INFO("Begin verify bsm\n");
6010
6011 /* verify BSM SRAM contents */
6012 val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
6013 for (reg = BSM_SRAM_LOWER_BOUND;
6014 reg < BSM_SRAM_LOWER_BOUND + len;
6015 reg += sizeof(u32), image ++) {
6016 val = iwl_read_restricted_reg(priv, reg);
6017 if (val != le32_to_cpu(*image)) {
6018 IWL_ERROR("BSM uCode verification failed at "
6019 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6020 BSM_SRAM_LOWER_BOUND,
6021 reg - BSM_SRAM_LOWER_BOUND, len,
6022 val, le32_to_cpu(*image));
6023 return -EIO;
6024 }
6025 }
6026
6027 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6028
6029 return 0;
6030 }
6031
6032 /**
6033 * iwl_load_bsm - Load bootstrap instructions
6034 *
6035 * BSM operation:
6036 *
6037 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6038 * in special SRAM that does not power down during RFKILL. When powering back
6039 * up after power-saving sleeps (or during initial uCode load), the BSM loads
6040 * the bootstrap program into the on-board processor, and starts it.
6041 *
6042 * The bootstrap program loads (via DMA) instructions and data for a new
6043 * program from host DRAM locations indicated by the host driver in the
6044 * BSM_DRAM_* registers. Once the new program is loaded, it starts
6045 * automatically.
6046 *
6047 * When initializing the NIC, the host driver points the BSM to the
6048 * "initialize" uCode image. This uCode sets up some internal data, then
6049 * notifies host via "initialize alive" that it is complete.
6050 *
6051 * The host then replaces the BSM_DRAM_* pointer values to point to the
6052 * normal runtime uCode instructions and a backup uCode data cache buffer
6053 * (filled initially with starting data values for the on-board processor),
6054 * then triggers the "initialize" uCode to load and launch the runtime uCode,
6055 * which begins normal operation.
6056 *
6057 * When doing a power-save shutdown, runtime uCode saves data SRAM into
6058 * the backup data cache in DRAM before SRAM is powered down.
6059 *
6060 * When powering back up, the BSM loads the bootstrap program. This reloads
6061 * the runtime uCode instructions and the backup data cache into SRAM,
6062 * and re-launches the runtime uCode from where it left off.
6063 */
6064 static int iwl_load_bsm(struct iwl_priv *priv)
6065 {
6066 __le32 *image = priv->ucode_boot.v_addr;
6067 u32 len = priv->ucode_boot.len;
6068 dma_addr_t pinst;
6069 dma_addr_t pdata;
6070 u32 inst_len;
6071 u32 data_len;
6072 int rc;
6073 int i;
6074 u32 done;
6075 u32 reg_offset;
6076
6077 IWL_DEBUG_INFO("Begin load bsm\n");
6078
6079 /* make sure bootstrap program is no larger than BSM's SRAM size */
6080 if (len > IWL_MAX_BSM_SIZE)
6081 return -EINVAL;
6082
6083 /* Tell bootstrap uCode where to find the "Initialize" uCode
6084 * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
6085 * NOTE: iwl_initialize_alive_start() will replace these values,
6086 * after the "initialize" uCode has run, to point to
6087 * runtime/protocol instructions and backup data cache. */
6088 pinst = priv->ucode_init.p_addr >> 4;
6089 pdata = priv->ucode_init_data.p_addr >> 4;
6090 inst_len = priv->ucode_init.len;
6091 data_len = priv->ucode_init_data.len;
6092
6093 rc = iwl_grab_restricted_access(priv);
6094 if (rc)
6095 return rc;
6096
6097 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6098 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6099 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6100 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6101
6102 /* Fill BSM memory with bootstrap instructions */
6103 for (reg_offset = BSM_SRAM_LOWER_BOUND;
6104 reg_offset < BSM_SRAM_LOWER_BOUND + len;
6105 reg_offset += sizeof(u32), image++)
6106 _iwl_write_restricted_reg(priv, reg_offset,
6107 le32_to_cpu(*image));
6108
6109 rc = iwl_verify_bsm(priv);
6110 if (rc) {
6111 iwl_release_restricted_access(priv);
6112 return rc;
6113 }
6114
6115 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6116 iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
6117 iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
6118 RTC_INST_LOWER_BOUND);
6119 iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6120
6121 /* Load bootstrap code into instruction SRAM now,
6122 * to prepare to load "initialize" uCode */
6123 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6124 BSM_WR_CTRL_REG_BIT_START);
6125
6126 /* Wait for load of bootstrap uCode to finish */
6127 for (i = 0; i < 100; i++) {
6128 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
6129 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6130 break;
6131 udelay(10);
6132 }
6133 if (i < 100)
6134 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6135 else {
6136 IWL_ERROR("BSM write did not complete!\n");
6137 return -EIO;
6138 }
6139
6140 /* Enable future boot loads whenever power management unit triggers it
6141 * (e.g. when powering back up after power-save shutdown) */
6142 iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6143 BSM_WR_CTRL_REG_BIT_START_EN);
6144
6145 iwl_release_restricted_access(priv);
6146
6147 return 0;
6148 }
6149
6150 static void iwl_nic_start(struct iwl_priv *priv)
6151 {
6152 /* Remove all resets to allow NIC to operate */
6153 iwl_write32(priv, CSR_RESET, 0);
6154 }
6155
6156 /**
6157 * iwl_read_ucode - Read uCode images from disk file.
6158 *
6159 * Copy into buffers for card to fetch via bus-mastering
6160 */
6161 static int iwl_read_ucode(struct iwl_priv *priv)
6162 {
6163 struct iwl_ucode *ucode;
6164 int rc = 0;
6165 const struct firmware *ucode_raw;
6166 const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6167 u8 *src;
6168 size_t len;
6169 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6170
6171 /* Ask kernel firmware_class module to get the boot firmware off disk.
6172 * request_firmware() is synchronous, file is in memory on return. */
6173 rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6174 if (rc < 0) {
6175 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
6176 goto error;
6177 }
6178
6179 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6180 name, ucode_raw->size);
6181
6182 /* Make sure that we got at least our header! */
6183 if (ucode_raw->size < sizeof(*ucode)) {
6184 IWL_ERROR("File size way too small!\n");
6185 rc = -EINVAL;
6186 goto err_release;
6187 }
6188
6189 /* Data from ucode file: header followed by uCode images */
6190 ucode = (void *)ucode_raw->data;
6191
6192 ver = le32_to_cpu(ucode->ver);
6193 inst_size = le32_to_cpu(ucode->inst_size);
6194 data_size = le32_to_cpu(ucode->data_size);
6195 init_size = le32_to_cpu(ucode->init_size);
6196 init_data_size = le32_to_cpu(ucode->init_data_size);
6197 boot_size = le32_to_cpu(ucode->boot_size);
6198
6199 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6200 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6201 inst_size);
6202 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6203 data_size);
6204 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6205 init_size);
6206 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6207 init_data_size);
6208 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6209 boot_size);
6210
6211 /* Verify size of file vs. image size info in file's header */
6212 if (ucode_raw->size < sizeof(*ucode) +
6213 inst_size + data_size + init_size +
6214 init_data_size + boot_size) {
6215
6216 IWL_DEBUG_INFO("uCode file size %d too small\n",
6217 (int)ucode_raw->size);
6218 rc = -EINVAL;
6219 goto err_release;
6220 }
6221
6222 /* Verify that uCode images will fit in card's SRAM */
6223 if (inst_size > IWL_MAX_INST_SIZE) {
6224 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
6225 (int)inst_size);
6226 rc = -EINVAL;
6227 goto err_release;
6228 }
6229
6230 if (data_size > IWL_MAX_DATA_SIZE) {
6231 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
6232 (int)data_size);
6233 rc = -EINVAL;
6234 goto err_release;
6235 }
6236 if (init_size > IWL_MAX_INST_SIZE) {
6237 IWL_DEBUG_INFO
6238 ("uCode init instr len %d too large to fit in card\n",
6239 (int)init_size);
6240 rc = -EINVAL;
6241 goto err_release;
6242 }
6243 if (init_data_size > IWL_MAX_DATA_SIZE) {
6244 IWL_DEBUG_INFO
6245 ("uCode init data len %d too large to fit in card\n",
6246 (int)init_data_size);
6247 rc = -EINVAL;
6248 goto err_release;
6249 }
6250 if (boot_size > IWL_MAX_BSM_SIZE) {
6251 IWL_DEBUG_INFO
6252 ("uCode boot instr len %d too large to fit in bsm\n",
6253 (int)boot_size);
6254 rc = -EINVAL;
6255 goto err_release;
6256 }
6257
6258 /* Allocate ucode buffers for card's bus-master loading ... */
6259
6260 /* Runtime instructions and 2 copies of data:
6261 * 1) unmodified from disk
6262 * 2) backup cache for save/restore during power-downs */
6263 priv->ucode_code.len = inst_size;
6264 priv->ucode_code.v_addr =
6265 pci_alloc_consistent(priv->pci_dev,
6266 priv->ucode_code.len,
6267 &(priv->ucode_code.p_addr));
6268
6269 priv->ucode_data.len = data_size;
6270 priv->ucode_data.v_addr =
6271 pci_alloc_consistent(priv->pci_dev,
6272 priv->ucode_data.len,
6273 &(priv->ucode_data.p_addr));
6274
6275 priv->ucode_data_backup.len = data_size;
6276 priv->ucode_data_backup.v_addr =
6277 pci_alloc_consistent(priv->pci_dev,
6278 priv->ucode_data_backup.len,
6279 &(priv->ucode_data_backup.p_addr));
6280
6281
6282 /* Initialization instructions and data */
6283 priv->ucode_init.len = init_size;
6284 priv->ucode_init.v_addr =
6285 pci_alloc_consistent(priv->pci_dev,
6286 priv->ucode_init.len,
6287 &(priv->ucode_init.p_addr));
6288
6289 priv->ucode_init_data.len = init_data_size;
6290 priv->ucode_init_data.v_addr =
6291 pci_alloc_consistent(priv->pci_dev,
6292 priv->ucode_init_data.len,
6293 &(priv->ucode_init_data.p_addr));
6294
6295 /* Bootstrap (instructions only, no data) */
6296 priv->ucode_boot.len = boot_size;
6297 priv->ucode_boot.v_addr =
6298 pci_alloc_consistent(priv->pci_dev,
6299 priv->ucode_boot.len,
6300 &(priv->ucode_boot.p_addr));
6301
6302 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
6303 !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
6304 !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
6305 goto err_pci_alloc;
6306
6307 /* Copy images into buffers for card's bus-master reads ... */
6308
6309 /* Runtime instructions (first block of data in file) */
6310 src = &ucode->data[0];
6311 len = priv->ucode_code.len;
6312 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
6313 (int)len);
6314 memcpy(priv->ucode_code.v_addr, src, len);
6315 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6316 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6317
6318 /* Runtime data (2nd block)
6319 * NOTE: Copy into backup buffer will be done in iwl_up() */
6320 src = &ucode->data[inst_size];
6321 len = priv->ucode_data.len;
6322 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
6323 (int)len);
6324 memcpy(priv->ucode_data.v_addr, src, len);
6325 memcpy(priv->ucode_data_backup.v_addr, src, len);
6326
6327 /* Initialization instructions (3rd block) */
6328 if (init_size) {
6329 src = &ucode->data[inst_size + data_size];
6330 len = priv->ucode_init.len;
6331 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
6332 (int)len);
6333 memcpy(priv->ucode_init.v_addr, src, len);
6334 }
6335
6336 /* Initialization data (4th block) */
6337 if (init_data_size) {
6338 src = &ucode->data[inst_size + data_size + init_size];
6339 len = priv->ucode_init_data.len;
6340 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
6341 (int)len);
6342 memcpy(priv->ucode_init_data.v_addr, src, len);
6343 }
6344
6345 /* Bootstrap instructions (5th block) */
6346 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6347 len = priv->ucode_boot.len;
6348 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
6349 (int)len);
6350 memcpy(priv->ucode_boot.v_addr, src, len);
6351
6352 /* We have our copies now, allow OS release its copies */
6353 release_firmware(ucode_raw);
6354 return 0;
6355
6356 err_pci_alloc:
6357 IWL_ERROR("failed to allocate pci memory\n");
6358 rc = -ENOMEM;
6359 iwl_dealloc_ucode_pci(priv);
6360
6361 err_release:
6362 release_firmware(ucode_raw);
6363
6364 error:
6365 return rc;
6366 }
6367
6368
6369 /**
6370 * iwl_set_ucode_ptrs - Set uCode address location
6371 *
6372 * Tell initialization uCode where to find runtime uCode.
6373 *
6374 * BSM registers initially contain pointers to initialization uCode.
6375 * We need to replace them to load runtime uCode inst and data,
6376 * and to save runtime data when powering down.
6377 */
6378 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6379 {
6380 dma_addr_t pinst;
6381 dma_addr_t pdata;
6382 int rc = 0;
6383 unsigned long flags;
6384
6385 /* bits 35:4 for 4965 */
6386 pinst = priv->ucode_code.p_addr >> 4;
6387 pdata = priv->ucode_data_backup.p_addr >> 4;
6388
6389 spin_lock_irqsave(&priv->lock, flags);
6390 rc = iwl_grab_restricted_access(priv);
6391 if (rc) {
6392 spin_unlock_irqrestore(&priv->lock, flags);
6393 return rc;
6394 }
6395
6396 /* Tell bootstrap uCode where to find image to load */
6397 iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6398 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6399 iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6400 priv->ucode_data.len);
6401
6402 /* Inst bytecount must be last to set up, bit 31 signals uCode
6403 * that all new ptr/size info is in place */
6404 iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6405 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6406
6407 iwl_release_restricted_access(priv);
6408
6409 spin_unlock_irqrestore(&priv->lock, flags);
6410
6411 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6412
6413 return rc;
6414 }
6415
6416 /**
6417 * iwl_init_alive_start - Called after REPLY_ALIVE notification received
6418 *
6419 * Called after REPLY_ALIVE notification received from "initialize" uCode.
6420 *
6421 * The 4965 "initialize" ALIVE reply contains calibration data for:
6422 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
6423 * (3945 does not contain this data).
6424 *
6425 * Tell "initialize" uCode to go ahead and load the runtime uCode.
6426 */
6427 static void iwl_init_alive_start(struct iwl_priv *priv)
6428 {
6429 /* Check alive response for "valid" sign from uCode */
6430 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6431 /* We had an error bringing up the hardware, so take it
6432 * all the way back down so we can try again */
6433 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6434 goto restart;
6435 }
6436
6437 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6438 * This is a paranoid check, because we would not have gotten the
6439 * "initialize" alive if code weren't properly loaded. */
6440 if (iwl_verify_ucode(priv)) {
6441 /* Runtime instruction load was bad;
6442 * take it all the way back down so we can try again */
6443 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6444 goto restart;
6445 }
6446
6447 /* Calculate temperature */
6448 priv->temperature = iwl4965_get_temperature(priv);
6449
6450 /* Send pointers to protocol/runtime uCode image ... init code will
6451 * load and launch runtime uCode, which will send us another "Alive"
6452 * notification. */
6453 IWL_DEBUG_INFO("Initialization Alive received.\n");
6454 if (iwl_set_ucode_ptrs(priv)) {
6455 /* Runtime instruction load won't happen;
6456 * take it all the way back down so we can try again */
6457 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6458 goto restart;
6459 }
6460 return;
6461
6462 restart:
6463 queue_work(priv->workqueue, &priv->restart);
6464 }
6465
6466
6467 /**
6468 * iwl_alive_start - called after REPLY_ALIVE notification received
6469 * from protocol/runtime uCode (initialization uCode's
6470 * Alive gets handled by iwl_init_alive_start()).
6471 */
6472 static void iwl_alive_start(struct iwl_priv *priv)
6473 {
6474 int rc = 0;
6475
6476 IWL_DEBUG_INFO("Runtime Alive received.\n");
6477
6478 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6479 /* We had an error bringing up the hardware, so take it
6480 * all the way back down so we can try again */
6481 IWL_DEBUG_INFO("Alive failed.\n");
6482 goto restart;
6483 }
6484
6485 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6486 * This is a paranoid check, because we would not have gotten the
6487 * "runtime" alive if code weren't properly loaded. */
6488 if (iwl_verify_ucode(priv)) {
6489 /* Runtime instruction load was bad;
6490 * take it all the way back down so we can try again */
6491 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6492 goto restart;
6493 }
6494
6495 iwl_clear_stations_table(priv);
6496
6497 rc = iwl4965_alive_notify(priv);
6498 if (rc) {
6499 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6500 rc);
6501 goto restart;
6502 }
6503
6504 /* After the ALIVE response, we can process host commands */
6505 set_bit(STATUS_ALIVE, &priv->status);
6506
6507 /* Clear out the uCode error bit if it is set */
6508 clear_bit(STATUS_FW_ERROR, &priv->status);
6509
6510 rc = iwl_init_channel_map(priv);
6511 if (rc) {
6512 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6513 return;
6514 }
6515
6516 iwl_init_geos(priv);
6517
6518 if (iwl_is_rfkill(priv))
6519 return;
6520
6521 if (!priv->mac80211_registered) {
6522 /* Unlock so any user space entry points can call back into
6523 * the driver without a deadlock... */
6524 mutex_unlock(&priv->mutex);
6525 iwl_rate_control_register(priv->hw);
6526 rc = ieee80211_register_hw(priv->hw);
6527 priv->hw->conf.beacon_int = 100;
6528 mutex_lock(&priv->mutex);
6529
6530 if (rc) {
6531 iwl_rate_control_unregister(priv->hw);
6532 IWL_ERROR("Failed to register network "
6533 "device (error %d)\n", rc);
6534 return;
6535 }
6536
6537 priv->mac80211_registered = 1;
6538
6539 iwl_reset_channel_flag(priv);
6540 } else
6541 ieee80211_start_queues(priv->hw);
6542
6543 priv->active_rate = priv->rates_mask;
6544 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6545
6546 iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6547
6548 if (iwl_is_associated(priv)) {
6549 struct iwl_rxon_cmd *active_rxon =
6550 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6551
6552 memcpy(&priv->staging_rxon, &priv->active_rxon,
6553 sizeof(priv->staging_rxon));
6554 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6555 } else {
6556 /* Initialize our rx_config data */
6557 iwl_connection_init_rx_config(priv);
6558 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6559 }
6560
6561 /* Configure BT coexistence */
6562 iwl_send_bt_config(priv);
6563
6564 /* Configure the adapter for unassociated operation */
6565 iwl_commit_rxon(priv);
6566
6567 /* At this point, the NIC is initialized and operational */
6568 priv->notif_missed_beacons = 0;
6569 set_bit(STATUS_READY, &priv->status);
6570
6571 iwl4965_rf_kill_ct_config(priv);
6572 IWL_DEBUG_INFO("ALIVE processing complete.\n");
6573
6574 if (priv->error_recovering)
6575 iwl_error_recovery(priv);
6576
6577 return;
6578
6579 restart:
6580 queue_work(priv->workqueue, &priv->restart);
6581 }
6582
6583 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6584
6585 static void __iwl_down(struct iwl_priv *priv)
6586 {
6587 unsigned long flags;
6588 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6589 struct ieee80211_conf *conf = NULL;
6590
6591 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6592
6593 conf = ieee80211_get_hw_conf(priv->hw);
6594
6595 if (!exit_pending)
6596 set_bit(STATUS_EXIT_PENDING, &priv->status);
6597
6598 iwl_clear_stations_table(priv);
6599
6600 /* Unblock any waiting calls */
6601 wake_up_interruptible_all(&priv->wait_command_queue);
6602
6603 /* Wipe out the EXIT_PENDING status bit if we are not actually
6604 * exiting the module */
6605 if (!exit_pending)
6606 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6607
6608 /* stop and reset the on-board processor */
6609 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6610
6611 /* tell the device to stop sending interrupts */
6612 iwl_disable_interrupts(priv);
6613
6614 if (priv->mac80211_registered)
6615 ieee80211_stop_queues(priv->hw);
6616
6617 /* If we have not previously called iwl_init() then
6618 * clear all bits but the RF Kill and SUSPEND bits and return */
6619 if (!iwl_is_init(priv)) {
6620 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6621 STATUS_RF_KILL_HW |
6622 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6623 STATUS_RF_KILL_SW |
6624 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6625 STATUS_IN_SUSPEND;
6626 goto exit;
6627 }
6628
6629 /* ...otherwise clear out all the status bits but the RF Kill and
6630 * SUSPEND bits and continue taking the NIC down. */
6631 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6632 STATUS_RF_KILL_HW |
6633 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6634 STATUS_RF_KILL_SW |
6635 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6636 STATUS_IN_SUSPEND |
6637 test_bit(STATUS_FW_ERROR, &priv->status) <<
6638 STATUS_FW_ERROR;
6639
6640 spin_lock_irqsave(&priv->lock, flags);
6641 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6642 spin_unlock_irqrestore(&priv->lock, flags);
6643
6644 iwl_hw_txq_ctx_stop(priv);
6645 iwl_hw_rxq_stop(priv);
6646
6647 spin_lock_irqsave(&priv->lock, flags);
6648 if (!iwl_grab_restricted_access(priv)) {
6649 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6650 APMG_CLK_VAL_DMA_CLK_RQT);
6651 iwl_release_restricted_access(priv);
6652 }
6653 spin_unlock_irqrestore(&priv->lock, flags);
6654
6655 udelay(5);
6656
6657 iwl_hw_nic_stop_master(priv);
6658 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6659 iwl_hw_nic_reset(priv);
6660
6661 exit:
6662 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6663
6664 if (priv->ibss_beacon)
6665 dev_kfree_skb(priv->ibss_beacon);
6666 priv->ibss_beacon = NULL;
6667
6668 /* clear out any free frames */
6669 iwl_clear_free_frames(priv);
6670 }
6671
6672 static void iwl_down(struct iwl_priv *priv)
6673 {
6674 mutex_lock(&priv->mutex);
6675 __iwl_down(priv);
6676 mutex_unlock(&priv->mutex);
6677
6678 iwl_cancel_deferred_work(priv);
6679 }
6680
6681 #define MAX_HW_RESTARTS 5
6682
6683 static int __iwl_up(struct iwl_priv *priv)
6684 {
6685 DECLARE_MAC_BUF(mac);
6686 int rc, i;
6687 u32 hw_rf_kill = 0;
6688
6689 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6690 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6691 return -EIO;
6692 }
6693
6694 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6695 IWL_WARNING("Radio disabled by SW RF kill (module "
6696 "parameter)\n");
6697 return 0;
6698 }
6699
6700 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6701 IWL_ERROR("ucode not available for device bringup\n");
6702 return -EIO;
6703 }
6704
6705 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6706
6707 rc = iwl_hw_nic_init(priv);
6708 if (rc) {
6709 IWL_ERROR("Unable to int nic\n");
6710 return rc;
6711 }
6712
6713 /* make sure rfkill handshake bits are cleared */
6714 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6715 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6716 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6717
6718 /* clear (again), then enable host interrupts */
6719 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6720 iwl_enable_interrupts(priv);
6721
6722 /* really make sure rfkill handshake bits are cleared */
6723 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6724 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6725
6726 /* Copy original ucode data image from disk into backup cache.
6727 * This will be used to initialize the on-board processor's
6728 * data SRAM for a clean start when the runtime program first loads. */
6729 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6730 priv->ucode_data.len);
6731
6732 /* If platform's RF_KILL switch is set to KILL,
6733 * wait for BIT_INT_RF_KILL interrupt before loading uCode
6734 * and getting things started */
6735 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
6736 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
6737 hw_rf_kill = 1;
6738
6739 if (test_bit(STATUS_RF_KILL_HW, &priv->status) || hw_rf_kill) {
6740 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6741 return 0;
6742 }
6743
6744 for (i = 0; i < MAX_HW_RESTARTS; i++) {
6745
6746 iwl_clear_stations_table(priv);
6747
6748 /* load bootstrap state machine,
6749 * load bootstrap program into processor's memory,
6750 * prepare to load the "initialize" uCode */
6751 rc = iwl_load_bsm(priv);
6752
6753 if (rc) {
6754 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6755 continue;
6756 }
6757
6758 /* start card; "initialize" will load runtime ucode */
6759 iwl_nic_start(priv);
6760
6761 /* MAC Address location in EEPROM same for 3945/4965 */
6762 get_eeprom_mac(priv, priv->mac_addr);
6763 IWL_DEBUG_INFO("MAC address: %s\n",
6764 print_mac(mac, priv->mac_addr));
6765
6766 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6767
6768 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6769
6770 return 0;
6771 }
6772
6773 set_bit(STATUS_EXIT_PENDING, &priv->status);
6774 __iwl_down(priv);
6775
6776 /* tried to restart and config the device for as long as our
6777 * patience could withstand */
6778 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6779 return -EIO;
6780 }
6781
6782
6783 /*****************************************************************************
6784 *
6785 * Workqueue callbacks
6786 *
6787 *****************************************************************************/
6788
6789 static void iwl_bg_init_alive_start(struct work_struct *data)
6790 {
6791 struct iwl_priv *priv =
6792 container_of(data, struct iwl_priv, init_alive_start.work);
6793
6794 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6795 return;
6796
6797 mutex_lock(&priv->mutex);
6798 iwl_init_alive_start(priv);
6799 mutex_unlock(&priv->mutex);
6800 }
6801
6802 static void iwl_bg_alive_start(struct work_struct *data)
6803 {
6804 struct iwl_priv *priv =
6805 container_of(data, struct iwl_priv, alive_start.work);
6806
6807 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6808 return;
6809
6810 mutex_lock(&priv->mutex);
6811 iwl_alive_start(priv);
6812 mutex_unlock(&priv->mutex);
6813 }
6814
6815 static void iwl_bg_rf_kill(struct work_struct *work)
6816 {
6817 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6818
6819 wake_up_interruptible(&priv->wait_command_queue);
6820
6821 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6822 return;
6823
6824 mutex_lock(&priv->mutex);
6825
6826 if (!iwl_is_rfkill(priv)) {
6827 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6828 "HW and/or SW RF Kill no longer active, restarting "
6829 "device\n");
6830 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6831 queue_work(priv->workqueue, &priv->restart);
6832 } else {
6833
6834 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6835 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6836 "disabled by SW switch\n");
6837 else
6838 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6839 "Kill switch must be turned off for "
6840 "wireless networking to work.\n");
6841 }
6842 mutex_unlock(&priv->mutex);
6843 }
6844
6845 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6846
6847 static void iwl_bg_scan_check(struct work_struct *data)
6848 {
6849 struct iwl_priv *priv =
6850 container_of(data, struct iwl_priv, scan_check.work);
6851
6852 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6853 return;
6854
6855 mutex_lock(&priv->mutex);
6856 if (test_bit(STATUS_SCANNING, &priv->status) ||
6857 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6858 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6859 "Scan completion watchdog resetting adapter (%dms)\n",
6860 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6861
6862 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6863 iwl_send_scan_abort(priv);
6864 }
6865 mutex_unlock(&priv->mutex);
6866 }
6867
6868 static void iwl_bg_request_scan(struct work_struct *data)
6869 {
6870 struct iwl_priv *priv =
6871 container_of(data, struct iwl_priv, request_scan);
6872 struct iwl_host_cmd cmd = {
6873 .id = REPLY_SCAN_CMD,
6874 .len = sizeof(struct iwl_scan_cmd),
6875 .meta.flags = CMD_SIZE_HUGE,
6876 };
6877 int rc = 0;
6878 struct iwl_scan_cmd *scan;
6879 struct ieee80211_conf *conf = NULL;
6880 u8 direct_mask;
6881 int phymode;
6882
6883 conf = ieee80211_get_hw_conf(priv->hw);
6884
6885 mutex_lock(&priv->mutex);
6886
6887 if (!iwl_is_ready(priv)) {
6888 IWL_WARNING("request scan called when driver not ready.\n");
6889 goto done;
6890 }
6891
6892 /* Make sure the scan wasn't cancelled before this queued work
6893 * was given the chance to run... */
6894 if (!test_bit(STATUS_SCANNING, &priv->status))
6895 goto done;
6896
6897 /* This should never be called or scheduled if there is currently
6898 * a scan active in the hardware. */
6899 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6900 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6901 "Ignoring second request.\n");
6902 rc = -EIO;
6903 goto done;
6904 }
6905
6906 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6907 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6908 goto done;
6909 }
6910
6911 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6912 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6913 goto done;
6914 }
6915
6916 if (iwl_is_rfkill(priv)) {
6917 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6918 goto done;
6919 }
6920
6921 if (!test_bit(STATUS_READY, &priv->status)) {
6922 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6923 goto done;
6924 }
6925
6926 if (!priv->scan_bands) {
6927 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6928 goto done;
6929 }
6930
6931 if (!priv->scan) {
6932 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6933 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6934 if (!priv->scan) {
6935 rc = -ENOMEM;
6936 goto done;
6937 }
6938 }
6939 scan = priv->scan;
6940 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6941
6942 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6943 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6944
6945 if (iwl_is_associated(priv)) {
6946 u16 interval = 0;
6947 u32 extra;
6948 u32 suspend_time = 100;
6949 u32 scan_suspend_time = 100;
6950 unsigned long flags;
6951
6952 IWL_DEBUG_INFO("Scanning while associated...\n");
6953
6954 spin_lock_irqsave(&priv->lock, flags);
6955 interval = priv->beacon_int;
6956 spin_unlock_irqrestore(&priv->lock, flags);
6957
6958 scan->suspend_time = 0;
6959 scan->max_out_time = cpu_to_le32(200 * 1024);
6960 if (!interval)
6961 interval = suspend_time;
6962
6963 extra = (suspend_time / interval) << 22;
6964 scan_suspend_time = (extra |
6965 ((suspend_time % interval) * 1024));
6966 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6967 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6968 scan_suspend_time, interval);
6969 }
6970
6971 /* We should add the ability for user to lock to PASSIVE ONLY */
6972 if (priv->one_direct_scan) {
6973 IWL_DEBUG_SCAN
6974 ("Kicking off one direct scan for '%s'\n",
6975 iwl_escape_essid(priv->direct_ssid,
6976 priv->direct_ssid_len));
6977 scan->direct_scan[0].id = WLAN_EID_SSID;
6978 scan->direct_scan[0].len = priv->direct_ssid_len;
6979 memcpy(scan->direct_scan[0].ssid,
6980 priv->direct_ssid, priv->direct_ssid_len);
6981 direct_mask = 1;
6982 } else if (!iwl_is_associated(priv) && priv->essid_len) {
6983 scan->direct_scan[0].id = WLAN_EID_SSID;
6984 scan->direct_scan[0].len = priv->essid_len;
6985 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6986 direct_mask = 1;
6987 } else
6988 direct_mask = 0;
6989
6990 /* We don't build a direct scan probe request; the uCode will do
6991 * that based on the direct_mask added to each channel entry */
6992 scan->tx_cmd.len = cpu_to_le16(
6993 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6994 IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6995 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6996 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6997 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6998
6999 /* flags + rate selection */
7000
7001 scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
7002
7003 switch (priv->scan_bands) {
7004 case 2:
7005 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
7006 scan->tx_cmd.rate_n_flags =
7007 iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
7008 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
7009
7010 scan->good_CRC_th = 0;
7011 phymode = MODE_IEEE80211G;
7012 break;
7013
7014 case 1:
7015 scan->tx_cmd.rate_n_flags =
7016 iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
7017 RATE_MCS_ANT_B_MSK);
7018 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7019 phymode = MODE_IEEE80211A;
7020 break;
7021
7022 default:
7023 IWL_WARNING("Invalid scan band count\n");
7024 goto done;
7025 }
7026
7027 /* select Rx chains */
7028
7029 /* Force use of chains B and C (0x6) for scan Rx.
7030 * Avoid A (0x1) because of its off-channel reception on A-band.
7031 * MIMO is not used here, but value is required to make uCode happy. */
7032 scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7033 cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7034 (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7035 (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7036
7037 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7038 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7039
7040 if (direct_mask)
7041 IWL_DEBUG_SCAN
7042 ("Initiating direct scan for %s.\n",
7043 iwl_escape_essid(priv->essid, priv->essid_len));
7044 else
7045 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7046
7047 scan->channel_count =
7048 iwl_get_channels_for_scan(
7049 priv, phymode, 1, /* active */
7050 direct_mask,
7051 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7052
7053 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7054 scan->channel_count * sizeof(struct iwl_scan_channel);
7055 cmd.data = scan;
7056 scan->len = cpu_to_le16(cmd.len);
7057
7058 set_bit(STATUS_SCAN_HW, &priv->status);
7059 rc = iwl_send_cmd_sync(priv, &cmd);
7060 if (rc)
7061 goto done;
7062
7063 queue_delayed_work(priv->workqueue, &priv->scan_check,
7064 IWL_SCAN_CHECK_WATCHDOG);
7065
7066 mutex_unlock(&priv->mutex);
7067 return;
7068
7069 done:
7070 /* inform mac80211 scan aborted */
7071 queue_work(priv->workqueue, &priv->scan_completed);
7072 mutex_unlock(&priv->mutex);
7073 }
7074
7075 static void iwl_bg_up(struct work_struct *data)
7076 {
7077 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
7078
7079 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7080 return;
7081
7082 mutex_lock(&priv->mutex);
7083 __iwl_up(priv);
7084 mutex_unlock(&priv->mutex);
7085 }
7086
7087 static void iwl_bg_restart(struct work_struct *data)
7088 {
7089 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
7090
7091 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7092 return;
7093
7094 iwl_down(priv);
7095 queue_work(priv->workqueue, &priv->up);
7096 }
7097
7098 static void iwl_bg_rx_replenish(struct work_struct *data)
7099 {
7100 struct iwl_priv *priv =
7101 container_of(data, struct iwl_priv, rx_replenish);
7102
7103 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7104 return;
7105
7106 mutex_lock(&priv->mutex);
7107 iwl_rx_replenish(priv);
7108 mutex_unlock(&priv->mutex);
7109 }
7110
7111 static void iwl_bg_post_associate(struct work_struct *data)
7112 {
7113 struct iwl_priv *priv = container_of(data, struct iwl_priv,
7114 post_associate.work);
7115
7116 int rc = 0;
7117 struct ieee80211_conf *conf = NULL;
7118 DECLARE_MAC_BUF(mac);
7119
7120 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7121 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7122 return;
7123 }
7124
7125 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7126 priv->assoc_id,
7127 print_mac(mac, priv->active_rxon.bssid_addr));
7128
7129
7130 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7131 return;
7132
7133 mutex_lock(&priv->mutex);
7134
7135 if (!priv->interface_id || !priv->is_open) {
7136 mutex_unlock(&priv->mutex);
7137 return;
7138 }
7139 iwl_scan_cancel_timeout(priv, 200);
7140
7141 conf = ieee80211_get_hw_conf(priv->hw);
7142
7143 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7144 iwl_commit_rxon(priv);
7145
7146 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7147 iwl_setup_rxon_timing(priv);
7148 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7149 sizeof(priv->rxon_timing), &priv->rxon_timing);
7150 if (rc)
7151 IWL_WARNING("REPLY_RXON_TIMING failed - "
7152 "Attempting to continue.\n");
7153
7154 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7155
7156 #ifdef CONFIG_IWLWIFI_HT
7157 if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
7158 iwl4965_set_rxon_ht(priv, &priv->current_assoc_ht);
7159 else {
7160 priv->active_rate_ht[0] = 0;
7161 priv->active_rate_ht[1] = 0;
7162 priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
7163 }
7164 #endif /* CONFIG_IWLWIFI_HT*/
7165 iwl4965_set_rxon_chain(priv);
7166 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7167
7168 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7169 priv->assoc_id, priv->beacon_int);
7170
7171 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7172 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7173 else
7174 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7175
7176 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7177 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7178 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7179 else
7180 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7181
7182 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7183 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7184
7185 }
7186
7187 iwl_commit_rxon(priv);
7188
7189 switch (priv->iw_mode) {
7190 case IEEE80211_IF_TYPE_STA:
7191 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
7192 break;
7193
7194 case IEEE80211_IF_TYPE_IBSS:
7195
7196 /* clear out the station table */
7197 iwl_clear_stations_table(priv);
7198
7199 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7200 iwl_rxon_add_station(priv, priv->bssid, 0);
7201 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
7202 iwl_send_beacon_cmd(priv);
7203
7204 break;
7205
7206 default:
7207 IWL_ERROR("%s Should not be called in %d mode\n",
7208 __FUNCTION__, priv->iw_mode);
7209 break;
7210 }
7211
7212 iwl_sequence_reset(priv);
7213
7214 #ifdef CONFIG_IWLWIFI_SENSITIVITY
7215 /* Enable Rx differential gain and sensitivity calibrations */
7216 iwl4965_chain_noise_reset(priv);
7217 priv->start_calib = 1;
7218 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
7219
7220 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7221 priv->assoc_station_added = 1;
7222
7223 #ifdef CONFIG_IWLWIFI_QOS
7224 iwl_activate_qos(priv, 0);
7225 #endif /* CONFIG_IWLWIFI_QOS */
7226 mutex_unlock(&priv->mutex);
7227 }
7228
7229 static void iwl_bg_abort_scan(struct work_struct *work)
7230 {
7231 struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
7232
7233 if (!iwl_is_ready(priv))
7234 return;
7235
7236 mutex_lock(&priv->mutex);
7237
7238 set_bit(STATUS_SCAN_ABORTING, &priv->status);
7239 iwl_send_scan_abort(priv);
7240
7241 mutex_unlock(&priv->mutex);
7242 }
7243
7244 static void iwl_bg_scan_completed(struct work_struct *work)
7245 {
7246 struct iwl_priv *priv =
7247 container_of(work, struct iwl_priv, scan_completed);
7248
7249 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7250
7251 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7252 return;
7253
7254 ieee80211_scan_completed(priv->hw);
7255
7256 /* Since setting the TXPOWER may have been deferred while
7257 * performing the scan, fire one off */
7258 mutex_lock(&priv->mutex);
7259 iwl_hw_reg_send_txpower(priv);
7260 mutex_unlock(&priv->mutex);
7261 }
7262
7263 /*****************************************************************************
7264 *
7265 * mac80211 entry point functions
7266 *
7267 *****************************************************************************/
7268
7269 static int iwl_mac_start(struct ieee80211_hw *hw)
7270 {
7271 struct iwl_priv *priv = hw->priv;
7272
7273 IWL_DEBUG_MAC80211("enter\n");
7274
7275 /* we should be verifying the device is ready to be opened */
7276 mutex_lock(&priv->mutex);
7277
7278 priv->is_open = 1;
7279
7280 if (!iwl_is_rfkill(priv))
7281 ieee80211_start_queues(priv->hw);
7282
7283 mutex_unlock(&priv->mutex);
7284 IWL_DEBUG_MAC80211("leave\n");
7285 return 0;
7286 }
7287
7288 static void iwl_mac_stop(struct ieee80211_hw *hw)
7289 {
7290 struct iwl_priv *priv = hw->priv;
7291
7292 IWL_DEBUG_MAC80211("enter\n");
7293
7294
7295 mutex_lock(&priv->mutex);
7296 /* stop mac, cancel any scan request and clear
7297 * RXON_FILTER_ASSOC_MSK BIT
7298 */
7299 priv->is_open = 0;
7300 iwl_scan_cancel_timeout(priv, 100);
7301 cancel_delayed_work(&priv->post_associate);
7302 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7303 iwl_commit_rxon(priv);
7304 mutex_unlock(&priv->mutex);
7305
7306 IWL_DEBUG_MAC80211("leave\n");
7307 }
7308
7309 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7310 struct ieee80211_tx_control *ctl)
7311 {
7312 struct iwl_priv *priv = hw->priv;
7313
7314 IWL_DEBUG_MAC80211("enter\n");
7315
7316 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7317 IWL_DEBUG_MAC80211("leave - monitor\n");
7318 return -1;
7319 }
7320
7321 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7322 ctl->tx_rate);
7323
7324 if (iwl_tx_skb(priv, skb, ctl))
7325 dev_kfree_skb_any(skb);
7326
7327 IWL_DEBUG_MAC80211("leave\n");
7328 return 0;
7329 }
7330
7331 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
7332 struct ieee80211_if_init_conf *conf)
7333 {
7334 struct iwl_priv *priv = hw->priv;
7335 unsigned long flags;
7336 DECLARE_MAC_BUF(mac);
7337
7338 IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
7339
7340 if (priv->interface_id) {
7341 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
7342 return 0;
7343 }
7344
7345 spin_lock_irqsave(&priv->lock, flags);
7346 priv->interface_id = conf->if_id;
7347
7348 spin_unlock_irqrestore(&priv->lock, flags);
7349
7350 mutex_lock(&priv->mutex);
7351
7352 if (conf->mac_addr) {
7353 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7354 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7355 }
7356 iwl_set_mode(priv, conf->type);
7357
7358 IWL_DEBUG_MAC80211("leave\n");
7359 mutex_unlock(&priv->mutex);
7360
7361 return 0;
7362 }
7363
7364 /**
7365 * iwl_mac_config - mac80211 config callback
7366 *
7367 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7368 * be set inappropriately and the driver currently sets the hardware up to
7369 * use it whenever needed.
7370 */
7371 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7372 {
7373 struct iwl_priv *priv = hw->priv;
7374 const struct iwl_channel_info *ch_info;
7375 unsigned long flags;
7376
7377 mutex_lock(&priv->mutex);
7378 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7379
7380 if (!iwl_is_ready(priv)) {
7381 IWL_DEBUG_MAC80211("leave - not ready\n");
7382 mutex_unlock(&priv->mutex);
7383 return -EIO;
7384 }
7385
7386 /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
7387 * what is exposed through include/ declarations */
7388 if (unlikely(!iwl_param_disable_hw_scan &&
7389 test_bit(STATUS_SCANNING, &priv->status))) {
7390 IWL_DEBUG_MAC80211("leave - scanning\n");
7391 mutex_unlock(&priv->mutex);
7392 return 0;
7393 }
7394
7395 spin_lock_irqsave(&priv->lock, flags);
7396
7397 ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
7398 if (!is_channel_valid(ch_info)) {
7399 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7400 conf->channel, conf->phymode);
7401 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7402 spin_unlock_irqrestore(&priv->lock, flags);
7403 mutex_unlock(&priv->mutex);
7404 return -EINVAL;
7405 }
7406
7407 #ifdef CONFIG_IWLWIFI_HT
7408 /* if we are switching fron ht to 2.4 clear flags
7409 * from any ht related info since 2.4 does not
7410 * support ht */
7411 if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7412 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7413 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7414 #endif
7415 )
7416 priv->staging_rxon.flags = 0;
7417 #endif /* CONFIG_IWLWIFI_HT */
7418
7419 iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
7420
7421 iwl_set_flags_for_phymode(priv, conf->phymode);
7422
7423 /* The list of supported rates and rate mask can be different
7424 * for each phymode; since the phymode may have changed, reset
7425 * the rate mask to what mac80211 lists */
7426 iwl_set_rate(priv);
7427
7428 spin_unlock_irqrestore(&priv->lock, flags);
7429
7430 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7431 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7432 iwl_hw_channel_switch(priv, conf->channel);
7433 mutex_unlock(&priv->mutex);
7434 return 0;
7435 }
7436 #endif
7437
7438 iwl_radio_kill_sw(priv, !conf->radio_enabled);
7439
7440 if (!conf->radio_enabled) {
7441 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7442 mutex_unlock(&priv->mutex);
7443 return 0;
7444 }
7445
7446 if (iwl_is_rfkill(priv)) {
7447 IWL_DEBUG_MAC80211("leave - RF kill\n");
7448 mutex_unlock(&priv->mutex);
7449 return -EIO;
7450 }
7451
7452 iwl_set_rate(priv);
7453
7454 if (memcmp(&priv->active_rxon,
7455 &priv->staging_rxon, sizeof(priv->staging_rxon)))
7456 iwl_commit_rxon(priv);
7457 else
7458 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7459
7460 IWL_DEBUG_MAC80211("leave\n");
7461
7462 mutex_unlock(&priv->mutex);
7463
7464 return 0;
7465 }
7466
7467 static void iwl_config_ap(struct iwl_priv *priv)
7468 {
7469 int rc = 0;
7470
7471 if (priv->status & STATUS_EXIT_PENDING)
7472 return;
7473
7474 /* The following should be done only at AP bring up */
7475 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7476
7477 /* RXON - unassoc (to set timing command) */
7478 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7479 iwl_commit_rxon(priv);
7480
7481 /* RXON Timing */
7482 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7483 iwl_setup_rxon_timing(priv);
7484 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7485 sizeof(priv->rxon_timing), &priv->rxon_timing);
7486 if (rc)
7487 IWL_WARNING("REPLY_RXON_TIMING failed - "
7488 "Attempting to continue.\n");
7489
7490 iwl4965_set_rxon_chain(priv);
7491
7492 /* FIXME: what should be the assoc_id for AP? */
7493 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7494 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7495 priv->staging_rxon.flags |=
7496 RXON_FLG_SHORT_PREAMBLE_MSK;
7497 else
7498 priv->staging_rxon.flags &=
7499 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7500
7501 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7502 if (priv->assoc_capability &
7503 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7504 priv->staging_rxon.flags |=
7505 RXON_FLG_SHORT_SLOT_MSK;
7506 else
7507 priv->staging_rxon.flags &=
7508 ~RXON_FLG_SHORT_SLOT_MSK;
7509
7510 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7511 priv->staging_rxon.flags &=
7512 ~RXON_FLG_SHORT_SLOT_MSK;
7513 }
7514 /* restore RXON assoc */
7515 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7516 iwl_commit_rxon(priv);
7517 #ifdef CONFIG_IWLWIFI_QOS
7518 iwl_activate_qos(priv, 1);
7519 #endif
7520 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7521 }
7522 iwl_send_beacon_cmd(priv);
7523
7524 /* FIXME - we need to add code here to detect a totally new
7525 * configuration, reset the AP, unassoc, rxon timing, assoc,
7526 * clear sta table, add BCAST sta... */
7527 }
7528
7529 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7530 struct ieee80211_if_conf *conf)
7531 {
7532 struct iwl_priv *priv = hw->priv;
7533 DECLARE_MAC_BUF(mac);
7534 unsigned long flags;
7535 int rc;
7536
7537 if (conf == NULL)
7538 return -EIO;
7539
7540 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7541 (!conf->beacon || !conf->ssid_len)) {
7542 IWL_DEBUG_MAC80211
7543 ("Leaving in AP mode because HostAPD is not ready.\n");
7544 return 0;
7545 }
7546
7547 mutex_lock(&priv->mutex);
7548
7549 IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7550 if (conf->bssid)
7551 IWL_DEBUG_MAC80211("bssid: %s\n",
7552 print_mac(mac, conf->bssid));
7553
7554 /*
7555 * very dubious code was here; the probe filtering flag is never set:
7556 *
7557 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7558 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7559 */
7560 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7561 IWL_DEBUG_MAC80211("leave - scanning\n");
7562 mutex_unlock(&priv->mutex);
7563 return 0;
7564 }
7565
7566 if (priv->interface_id != if_id) {
7567 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7568 mutex_unlock(&priv->mutex);
7569 return 0;
7570 }
7571
7572 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7573 if (!conf->bssid) {
7574 conf->bssid = priv->mac_addr;
7575 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7576 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7577 print_mac(mac, conf->bssid));
7578 }
7579 if (priv->ibss_beacon)
7580 dev_kfree_skb(priv->ibss_beacon);
7581
7582 priv->ibss_beacon = conf->beacon;
7583 }
7584
7585 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7586 !is_multicast_ether_addr(conf->bssid)) {
7587 /* If there is currently a HW scan going on in the background
7588 * then we need to cancel it else the RXON below will fail. */
7589 if (iwl_scan_cancel_timeout(priv, 100)) {
7590 IWL_WARNING("Aborted scan still in progress "
7591 "after 100ms\n");
7592 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7593 mutex_unlock(&priv->mutex);
7594 return -EAGAIN;
7595 }
7596 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7597
7598 /* TODO: Audit driver for usage of these members and see
7599 * if mac80211 deprecates them (priv->bssid looks like it
7600 * shouldn't be there, but I haven't scanned the IBSS code
7601 * to verify) - jpk */
7602 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7603
7604 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7605 iwl_config_ap(priv);
7606 else {
7607 rc = iwl_commit_rxon(priv);
7608 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7609 iwl_rxon_add_station(
7610 priv, priv->active_rxon.bssid_addr, 1);
7611 }
7612
7613 } else {
7614 iwl_scan_cancel_timeout(priv, 100);
7615 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7616 iwl_commit_rxon(priv);
7617 }
7618
7619 spin_lock_irqsave(&priv->lock, flags);
7620 if (!conf->ssid_len)
7621 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7622 else
7623 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7624
7625 priv->essid_len = conf->ssid_len;
7626 spin_unlock_irqrestore(&priv->lock, flags);
7627
7628 IWL_DEBUG_MAC80211("leave\n");
7629 mutex_unlock(&priv->mutex);
7630
7631 return 0;
7632 }
7633
7634 static void iwl_configure_filter(struct ieee80211_hw *hw,
7635 unsigned int changed_flags,
7636 unsigned int *total_flags,
7637 int mc_count, struct dev_addr_list *mc_list)
7638 {
7639 /*
7640 * XXX: dummy
7641 * see also iwl_connection_init_rx_config
7642 */
7643 *total_flags = 0;
7644 }
7645
7646 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7647 struct ieee80211_if_init_conf *conf)
7648 {
7649 struct iwl_priv *priv = hw->priv;
7650
7651 IWL_DEBUG_MAC80211("enter\n");
7652
7653 mutex_lock(&priv->mutex);
7654
7655 iwl_scan_cancel_timeout(priv, 100);
7656 cancel_delayed_work(&priv->post_associate);
7657 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7658 iwl_commit_rxon(priv);
7659
7660 if (priv->interface_id == conf->if_id) {
7661 priv->interface_id = 0;
7662 memset(priv->bssid, 0, ETH_ALEN);
7663 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7664 priv->essid_len = 0;
7665 }
7666 mutex_unlock(&priv->mutex);
7667
7668 IWL_DEBUG_MAC80211("leave\n");
7669
7670 }
7671 static void iwl_mac_erp_ie_changed(struct ieee80211_hw *hw,
7672 u8 changes, int cts_protection, int preamble)
7673 {
7674
7675 struct iwl_priv *priv = hw->priv;
7676
7677 if (changes & IEEE80211_ERP_CHANGE_PREAMBLE) {
7678 if (preamble == WLAN_ERP_PREAMBLE_SHORT)
7679 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7680 else
7681 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7682 }
7683
7684 if (changes & IEEE80211_ERP_CHANGE_PROTECTION) {
7685 if (cts_protection)
7686 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7687 else
7688 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7689 }
7690
7691 if (iwl_is_associated(priv))
7692 iwl_send_rxon_assoc(priv);
7693 }
7694
7695 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7696 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7697 {
7698 int rc = 0;
7699 unsigned long flags;
7700 struct iwl_priv *priv = hw->priv;
7701
7702 IWL_DEBUG_MAC80211("enter\n");
7703
7704 mutex_lock(&priv->mutex);
7705 spin_lock_irqsave(&priv->lock, flags);
7706
7707 if (!iwl_is_ready_rf(priv)) {
7708 rc = -EIO;
7709 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7710 goto out_unlock;
7711 }
7712
7713 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
7714 rc = -EIO;
7715 IWL_ERROR("ERROR: APs don't scan\n");
7716 goto out_unlock;
7717 }
7718
7719 /* if we just finished scan ask for delay */
7720 if (priv->last_scan_jiffies &&
7721 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7722 jiffies)) {
7723 rc = -EAGAIN;
7724 goto out_unlock;
7725 }
7726 if (len) {
7727 IWL_DEBUG_SCAN("direct scan for "
7728 "%s [%d]\n ",
7729 iwl_escape_essid(ssid, len), (int)len);
7730
7731 priv->one_direct_scan = 1;
7732 priv->direct_ssid_len = (u8)
7733 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7734 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7735 } else
7736 priv->one_direct_scan = 0;
7737
7738 rc = iwl_scan_initiate(priv);
7739
7740 IWL_DEBUG_MAC80211("leave\n");
7741
7742 out_unlock:
7743 spin_unlock_irqrestore(&priv->lock, flags);
7744 mutex_unlock(&priv->mutex);
7745
7746 return rc;
7747 }
7748
7749 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7750 const u8 *local_addr, const u8 *addr,
7751 struct ieee80211_key_conf *key)
7752 {
7753 struct iwl_priv *priv = hw->priv;
7754 DECLARE_MAC_BUF(mac);
7755 int rc = 0;
7756 u8 sta_id;
7757
7758 IWL_DEBUG_MAC80211("enter\n");
7759
7760 if (!iwl_param_hwcrypto) {
7761 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7762 return -EOPNOTSUPP;
7763 }
7764
7765 if (is_zero_ether_addr(addr))
7766 /* only support pairwise keys */
7767 return -EOPNOTSUPP;
7768
7769 sta_id = iwl_hw_find_station(priv, addr);
7770 if (sta_id == IWL_INVALID_STATION) {
7771 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7772 print_mac(mac, addr));
7773 return -EINVAL;
7774 }
7775
7776 mutex_lock(&priv->mutex);
7777
7778 iwl_scan_cancel_timeout(priv, 100);
7779
7780 switch (cmd) {
7781 case SET_KEY:
7782 rc = iwl_update_sta_key_info(priv, key, sta_id);
7783 if (!rc) {
7784 iwl_set_rxon_hwcrypto(priv, 1);
7785 iwl_commit_rxon(priv);
7786 key->hw_key_idx = sta_id;
7787 IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7788 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7789 }
7790 break;
7791 case DISABLE_KEY:
7792 rc = iwl_clear_sta_key_info(priv, sta_id);
7793 if (!rc) {
7794 iwl_set_rxon_hwcrypto(priv, 0);
7795 iwl_commit_rxon(priv);
7796 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7797 }
7798 break;
7799 default:
7800 rc = -EINVAL;
7801 }
7802
7803 IWL_DEBUG_MAC80211("leave\n");
7804 mutex_unlock(&priv->mutex);
7805
7806 return rc;
7807 }
7808
7809 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7810 const struct ieee80211_tx_queue_params *params)
7811 {
7812 struct iwl_priv *priv = hw->priv;
7813 #ifdef CONFIG_IWLWIFI_QOS
7814 unsigned long flags;
7815 int q;
7816 #endif /* CONFIG_IWL_QOS */
7817
7818 IWL_DEBUG_MAC80211("enter\n");
7819
7820 if (!iwl_is_ready_rf(priv)) {
7821 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7822 return -EIO;
7823 }
7824
7825 if (queue >= AC_NUM) {
7826 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7827 return 0;
7828 }
7829
7830 #ifdef CONFIG_IWLWIFI_QOS
7831 if (!priv->qos_data.qos_enable) {
7832 priv->qos_data.qos_active = 0;
7833 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7834 return 0;
7835 }
7836 q = AC_NUM - 1 - queue;
7837
7838 spin_lock_irqsave(&priv->lock, flags);
7839
7840 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7841 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7842 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7843 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7844 cpu_to_le16((params->burst_time * 100));
7845
7846 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7847 priv->qos_data.qos_active = 1;
7848
7849 spin_unlock_irqrestore(&priv->lock, flags);
7850
7851 mutex_lock(&priv->mutex);
7852 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7853 iwl_activate_qos(priv, 1);
7854 else if (priv->assoc_id && iwl_is_associated(priv))
7855 iwl_activate_qos(priv, 0);
7856
7857 mutex_unlock(&priv->mutex);
7858
7859 #endif /*CONFIG_IWLWIFI_QOS */
7860
7861 IWL_DEBUG_MAC80211("leave\n");
7862 return 0;
7863 }
7864
7865 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7866 struct ieee80211_tx_queue_stats *stats)
7867 {
7868 struct iwl_priv *priv = hw->priv;
7869 int i, avail;
7870 struct iwl_tx_queue *txq;
7871 struct iwl_queue *q;
7872 unsigned long flags;
7873
7874 IWL_DEBUG_MAC80211("enter\n");
7875
7876 if (!iwl_is_ready_rf(priv)) {
7877 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7878 return -EIO;
7879 }
7880
7881 spin_lock_irqsave(&priv->lock, flags);
7882
7883 for (i = 0; i < AC_NUM; i++) {
7884 txq = &priv->txq[i];
7885 q = &txq->q;
7886 avail = iwl_queue_space(q);
7887
7888 stats->data[i].len = q->n_window - avail;
7889 stats->data[i].limit = q->n_window - q->high_mark;
7890 stats->data[i].count = q->n_window;
7891
7892 }
7893 spin_unlock_irqrestore(&priv->lock, flags);
7894
7895 IWL_DEBUG_MAC80211("leave\n");
7896
7897 return 0;
7898 }
7899
7900 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7901 struct ieee80211_low_level_stats *stats)
7902 {
7903 IWL_DEBUG_MAC80211("enter\n");
7904 IWL_DEBUG_MAC80211("leave\n");
7905
7906 return 0;
7907 }
7908
7909 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7910 {
7911 IWL_DEBUG_MAC80211("enter\n");
7912 IWL_DEBUG_MAC80211("leave\n");
7913
7914 return 0;
7915 }
7916
7917 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7918 {
7919 struct iwl_priv *priv = hw->priv;
7920 unsigned long flags;
7921
7922 mutex_lock(&priv->mutex);
7923 IWL_DEBUG_MAC80211("enter\n");
7924
7925 priv->lq_mngr.lq_ready = 0;
7926 #ifdef CONFIG_IWLWIFI_HT
7927 spin_lock_irqsave(&priv->lock, flags);
7928 memset(&priv->current_assoc_ht, 0, sizeof(struct sta_ht_info));
7929 spin_unlock_irqrestore(&priv->lock, flags);
7930 #ifdef CONFIG_IWLWIFI_HT_AGG
7931 /* if (priv->lq_mngr.agg_ctrl.granted_ba)
7932 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
7933
7934 memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl_agg_control));
7935 priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
7936 priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
7937 priv->lq_mngr.agg_ctrl.auto_agg = 1;
7938
7939 if (priv->lq_mngr.agg_ctrl.auto_agg)
7940 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
7941 #endif /*CONFIG_IWLWIFI_HT_AGG */
7942 #endif /* CONFIG_IWLWIFI_HT */
7943
7944 #ifdef CONFIG_IWLWIFI_QOS
7945 iwl_reset_qos(priv);
7946 #endif
7947
7948 cancel_delayed_work(&priv->post_associate);
7949
7950 spin_lock_irqsave(&priv->lock, flags);
7951 priv->assoc_id = 0;
7952 priv->assoc_capability = 0;
7953 priv->call_post_assoc_from_beacon = 0;
7954 priv->assoc_station_added = 0;
7955
7956 /* new association get rid of ibss beacon skb */
7957 if (priv->ibss_beacon)
7958 dev_kfree_skb(priv->ibss_beacon);
7959
7960 priv->ibss_beacon = NULL;
7961
7962 priv->beacon_int = priv->hw->conf.beacon_int;
7963 priv->timestamp1 = 0;
7964 priv->timestamp0 = 0;
7965 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7966 priv->beacon_int = 0;
7967
7968 spin_unlock_irqrestore(&priv->lock, flags);
7969
7970 /* we are restarting association process
7971 * clear RXON_FILTER_ASSOC_MSK bit
7972 */
7973 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7974 iwl_scan_cancel_timeout(priv, 100);
7975 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7976 iwl_commit_rxon(priv);
7977 }
7978
7979 /* Per mac80211.h: This is only used in IBSS mode... */
7980 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7981
7982 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7983 mutex_unlock(&priv->mutex);
7984 return;
7985 }
7986
7987 if (!iwl_is_ready_rf(priv)) {
7988 IWL_DEBUG_MAC80211("leave - not ready\n");
7989 mutex_unlock(&priv->mutex);
7990 return;
7991 }
7992
7993 priv->only_active_channel = 0;
7994
7995 iwl_set_rate(priv);
7996
7997 mutex_unlock(&priv->mutex);
7998
7999 IWL_DEBUG_MAC80211("leave\n");
8000
8001 }
8002
8003 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
8004 struct ieee80211_tx_control *control)
8005 {
8006 struct iwl_priv *priv = hw->priv;
8007 unsigned long flags;
8008
8009 mutex_lock(&priv->mutex);
8010 IWL_DEBUG_MAC80211("enter\n");
8011
8012 if (!iwl_is_ready_rf(priv)) {
8013 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8014 mutex_unlock(&priv->mutex);
8015 return -EIO;
8016 }
8017
8018 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8019 IWL_DEBUG_MAC80211("leave - not IBSS\n");
8020 mutex_unlock(&priv->mutex);
8021 return -EIO;
8022 }
8023
8024 spin_lock_irqsave(&priv->lock, flags);
8025
8026 if (priv->ibss_beacon)
8027 dev_kfree_skb(priv->ibss_beacon);
8028
8029 priv->ibss_beacon = skb;
8030
8031 priv->assoc_id = 0;
8032
8033 IWL_DEBUG_MAC80211("leave\n");
8034 spin_unlock_irqrestore(&priv->lock, flags);
8035
8036 #ifdef CONFIG_IWLWIFI_QOS
8037 iwl_reset_qos(priv);
8038 #endif
8039
8040 queue_work(priv->workqueue, &priv->post_associate.work);
8041
8042 mutex_unlock(&priv->mutex);
8043
8044 return 0;
8045 }
8046
8047 #ifdef CONFIG_IWLWIFI_HT
8048 union ht_cap_info {
8049 struct {
8050 u16 advanced_coding_cap :1;
8051 u16 supported_chan_width_set :1;
8052 u16 mimo_power_save_mode :2;
8053 u16 green_field :1;
8054 u16 short_GI20 :1;
8055 u16 short_GI40 :1;
8056 u16 tx_stbc :1;
8057 u16 rx_stbc :1;
8058 u16 beam_forming :1;
8059 u16 delayed_ba :1;
8060 u16 maximal_amsdu_size :1;
8061 u16 cck_mode_at_40MHz :1;
8062 u16 psmp_support :1;
8063 u16 stbc_ctrl_frame_support :1;
8064 u16 sig_txop_protection_support :1;
8065 };
8066 u16 val;
8067 } __attribute__ ((packed));
8068
8069 union ht_param_info{
8070 struct {
8071 u8 max_rx_ampdu_factor :2;
8072 u8 mpdu_density :3;
8073 u8 reserved :3;
8074 };
8075 u8 val;
8076 } __attribute__ ((packed));
8077
8078 union ht_exra_param_info {
8079 struct {
8080 u8 ext_chan_offset :2;
8081 u8 tx_chan_width :1;
8082 u8 rifs_mode :1;
8083 u8 controlled_access_only :1;
8084 u8 service_interval_granularity :3;
8085 };
8086 u8 val;
8087 } __attribute__ ((packed));
8088
8089 union ht_operation_mode{
8090 struct {
8091 u16 op_mode :2;
8092 u16 non_GF :1;
8093 u16 reserved :13;
8094 };
8095 u16 val;
8096 } __attribute__ ((packed));
8097
8098
8099 static int sta_ht_info_init(struct ieee80211_ht_capability *ht_cap,
8100 struct ieee80211_ht_additional_info *ht_extra,
8101 struct sta_ht_info *ht_info_ap,
8102 struct sta_ht_info *ht_info)
8103 {
8104 union ht_cap_info cap;
8105 union ht_operation_mode op_mode;
8106 union ht_param_info param_info;
8107 union ht_exra_param_info extra_param_info;
8108
8109 IWL_DEBUG_MAC80211("enter: \n");
8110
8111 if (!ht_info) {
8112 IWL_DEBUG_MAC80211("leave: ht_info is NULL\n");
8113 return -1;
8114 }
8115
8116 if (ht_cap) {
8117 cap.val = (u16) le16_to_cpu(ht_cap->capabilities_info);
8118 param_info.val = ht_cap->mac_ht_params_info;
8119 ht_info->is_ht = 1;
8120 if (cap.short_GI20)
8121 ht_info->sgf |= 0x1;
8122 if (cap.short_GI40)
8123 ht_info->sgf |= 0x2;
8124 ht_info->is_green_field = cap.green_field;
8125 ht_info->max_amsdu_size = cap.maximal_amsdu_size;
8126 ht_info->supported_chan_width = cap.supported_chan_width_set;
8127 ht_info->tx_mimo_ps_mode = cap.mimo_power_save_mode;
8128 memcpy(ht_info->supp_rates, ht_cap->supported_mcs_set, 16);
8129
8130 ht_info->ampdu_factor = param_info.max_rx_ampdu_factor;
8131 ht_info->mpdu_density = param_info.mpdu_density;
8132
8133 IWL_DEBUG_MAC80211("SISO mask 0x%X MIMO mask 0x%X \n",
8134 ht_cap->supported_mcs_set[0],
8135 ht_cap->supported_mcs_set[1]);
8136
8137 if (ht_info_ap) {
8138 ht_info->control_channel = ht_info_ap->control_channel;
8139 ht_info->extension_chan_offset =
8140 ht_info_ap->extension_chan_offset;
8141 ht_info->tx_chan_width = ht_info_ap->tx_chan_width;
8142 ht_info->operating_mode = ht_info_ap->operating_mode;
8143 }
8144
8145 if (ht_extra) {
8146 extra_param_info.val = ht_extra->ht_param;
8147 ht_info->control_channel = ht_extra->control_chan;
8148 ht_info->extension_chan_offset =
8149 extra_param_info.ext_chan_offset;
8150 ht_info->tx_chan_width = extra_param_info.tx_chan_width;
8151 op_mode.val = (u16)
8152 le16_to_cpu(ht_extra->operation_mode);
8153 ht_info->operating_mode = op_mode.op_mode;
8154 IWL_DEBUG_MAC80211("control channel %d\n",
8155 ht_extra->control_chan);
8156 }
8157 } else
8158 ht_info->is_ht = 0;
8159
8160 IWL_DEBUG_MAC80211("leave\n");
8161 return 0;
8162 }
8163
8164 static int iwl_mac_conf_ht(struct ieee80211_hw *hw,
8165 struct ieee80211_ht_capability *ht_cap,
8166 struct ieee80211_ht_additional_info *ht_extra)
8167 {
8168 struct iwl_priv *priv = hw->priv;
8169 int rs;
8170
8171 IWL_DEBUG_MAC80211("enter: \n");
8172
8173 rs = sta_ht_info_init(ht_cap, ht_extra, NULL, &priv->current_assoc_ht);
8174 iwl4965_set_rxon_chain(priv);
8175
8176 if (priv && priv->assoc_id &&
8177 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8178 unsigned long flags;
8179
8180 spin_lock_irqsave(&priv->lock, flags);
8181 if (priv->beacon_int)
8182 queue_work(priv->workqueue, &priv->post_associate.work);
8183 else
8184 priv->call_post_assoc_from_beacon = 1;
8185 spin_unlock_irqrestore(&priv->lock, flags);
8186 }
8187
8188 IWL_DEBUG_MAC80211("leave: control channel %d\n",
8189 ht_extra->control_chan);
8190 return rs;
8191
8192 }
8193
8194 static void iwl_set_ht_capab(struct ieee80211_hw *hw,
8195 struct ieee80211_ht_capability *ht_cap,
8196 u8 use_wide_chan)
8197 {
8198 union ht_cap_info cap;
8199 union ht_param_info param_info;
8200
8201 memset(&cap, 0, sizeof(union ht_cap_info));
8202 memset(&param_info, 0, sizeof(union ht_param_info));
8203
8204 cap.maximal_amsdu_size = HT_IE_MAX_AMSDU_SIZE_4K;
8205 cap.green_field = 1;
8206 cap.short_GI20 = 1;
8207 cap.short_GI40 = 1;
8208 cap.supported_chan_width_set = use_wide_chan;
8209 cap.mimo_power_save_mode = 0x3;
8210
8211 param_info.max_rx_ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
8212 param_info.mpdu_density = CFG_HT_MPDU_DENSITY_DEF;
8213 ht_cap->capabilities_info = (__le16) cpu_to_le16(cap.val);
8214 ht_cap->mac_ht_params_info = (u8) param_info.val;
8215
8216 ht_cap->supported_mcs_set[0] = 0xff;
8217 ht_cap->supported_mcs_set[1] = 0xff;
8218 ht_cap->supported_mcs_set[4] =
8219 (cap.supported_chan_width_set) ? 0x1: 0x0;
8220 }
8221
8222 static void iwl_mac_get_ht_capab(struct ieee80211_hw *hw,
8223 struct ieee80211_ht_capability *ht_cap)
8224 {
8225 u8 use_wide_channel = 1;
8226 struct iwl_priv *priv = hw->priv;
8227
8228 IWL_DEBUG_MAC80211("enter: \n");
8229 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
8230 use_wide_channel = 0;
8231
8232 /* no fat tx allowed on 2.4GHZ */
8233 if (priv->phymode != MODE_IEEE80211A)
8234 use_wide_channel = 0;
8235
8236 iwl_set_ht_capab(hw, ht_cap, use_wide_channel);
8237 IWL_DEBUG_MAC80211("leave: \n");
8238 }
8239 #endif /*CONFIG_IWLWIFI_HT*/
8240
8241 /*****************************************************************************
8242 *
8243 * sysfs attributes
8244 *
8245 *****************************************************************************/
8246
8247 #ifdef CONFIG_IWLWIFI_DEBUG
8248
8249 /*
8250 * The following adds a new attribute to the sysfs representation
8251 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8252 * used for controlling the debug level.
8253 *
8254 * See the level definitions in iwl for details.
8255 */
8256
8257 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8258 {
8259 return sprintf(buf, "0x%08X\n", iwl_debug_level);
8260 }
8261 static ssize_t store_debug_level(struct device_driver *d,
8262 const char *buf, size_t count)
8263 {
8264 char *p = (char *)buf;
8265 u32 val;
8266
8267 val = simple_strtoul(p, &p, 0);
8268 if (p == buf)
8269 printk(KERN_INFO DRV_NAME
8270 ": %s is not in hex or decimal form.\n", buf);
8271 else
8272 iwl_debug_level = val;
8273
8274 return strnlen(buf, count);
8275 }
8276
8277 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8278 show_debug_level, store_debug_level);
8279
8280 #endif /* CONFIG_IWLWIFI_DEBUG */
8281
8282 static ssize_t show_rf_kill(struct device *d,
8283 struct device_attribute *attr, char *buf)
8284 {
8285 /*
8286 * 0 - RF kill not enabled
8287 * 1 - SW based RF kill active (sysfs)
8288 * 2 - HW based RF kill active
8289 * 3 - Both HW and SW based RF kill active
8290 */
8291 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8292 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8293 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8294
8295 return sprintf(buf, "%i\n", val);
8296 }
8297
8298 static ssize_t store_rf_kill(struct device *d,
8299 struct device_attribute *attr,
8300 const char *buf, size_t count)
8301 {
8302 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8303
8304 mutex_lock(&priv->mutex);
8305 iwl_radio_kill_sw(priv, buf[0] == '1');
8306 mutex_unlock(&priv->mutex);
8307
8308 return count;
8309 }
8310
8311 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8312
8313 static ssize_t show_temperature(struct device *d,
8314 struct device_attribute *attr, char *buf)
8315 {
8316 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8317
8318 if (!iwl_is_alive(priv))
8319 return -EAGAIN;
8320
8321 return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
8322 }
8323
8324 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8325
8326 static ssize_t show_rs_window(struct device *d,
8327 struct device_attribute *attr,
8328 char *buf)
8329 {
8330 struct iwl_priv *priv = d->driver_data;
8331 return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8332 }
8333 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8334
8335 static ssize_t show_tx_power(struct device *d,
8336 struct device_attribute *attr, char *buf)
8337 {
8338 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8339 return sprintf(buf, "%d\n", priv->user_txpower_limit);
8340 }
8341
8342 static ssize_t store_tx_power(struct device *d,
8343 struct device_attribute *attr,
8344 const char *buf, size_t count)
8345 {
8346 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8347 char *p = (char *)buf;
8348 u32 val;
8349
8350 val = simple_strtoul(p, &p, 10);
8351 if (p == buf)
8352 printk(KERN_INFO DRV_NAME
8353 ": %s is not in decimal form.\n", buf);
8354 else
8355 iwl_hw_reg_set_txpower(priv, val);
8356
8357 return count;
8358 }
8359
8360 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8361
8362 static ssize_t show_flags(struct device *d,
8363 struct device_attribute *attr, char *buf)
8364 {
8365 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8366
8367 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8368 }
8369
8370 static ssize_t store_flags(struct device *d,
8371 struct device_attribute *attr,
8372 const char *buf, size_t count)
8373 {
8374 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8375 u32 flags = simple_strtoul(buf, NULL, 0);
8376
8377 mutex_lock(&priv->mutex);
8378 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8379 /* Cancel any currently running scans... */
8380 if (iwl_scan_cancel_timeout(priv, 100))
8381 IWL_WARNING("Could not cancel scan.\n");
8382 else {
8383 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8384 flags);
8385 priv->staging_rxon.flags = cpu_to_le32(flags);
8386 iwl_commit_rxon(priv);
8387 }
8388 }
8389 mutex_unlock(&priv->mutex);
8390
8391 return count;
8392 }
8393
8394 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8395
8396 static ssize_t show_filter_flags(struct device *d,
8397 struct device_attribute *attr, char *buf)
8398 {
8399 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8400
8401 return sprintf(buf, "0x%04X\n",
8402 le32_to_cpu(priv->active_rxon.filter_flags));
8403 }
8404
8405 static ssize_t store_filter_flags(struct device *d,
8406 struct device_attribute *attr,
8407 const char *buf, size_t count)
8408 {
8409 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8410 u32 filter_flags = simple_strtoul(buf, NULL, 0);
8411
8412 mutex_lock(&priv->mutex);
8413 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8414 /* Cancel any currently running scans... */
8415 if (iwl_scan_cancel_timeout(priv, 100))
8416 IWL_WARNING("Could not cancel scan.\n");
8417 else {
8418 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8419 "0x%04X\n", filter_flags);
8420 priv->staging_rxon.filter_flags =
8421 cpu_to_le32(filter_flags);
8422 iwl_commit_rxon(priv);
8423 }
8424 }
8425 mutex_unlock(&priv->mutex);
8426
8427 return count;
8428 }
8429
8430 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8431 store_filter_flags);
8432
8433 static ssize_t show_tune(struct device *d,
8434 struct device_attribute *attr, char *buf)
8435 {
8436 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8437
8438 return sprintf(buf, "0x%04X\n",
8439 (priv->phymode << 8) |
8440 le16_to_cpu(priv->active_rxon.channel));
8441 }
8442
8443 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
8444
8445 static ssize_t store_tune(struct device *d,
8446 struct device_attribute *attr,
8447 const char *buf, size_t count)
8448 {
8449 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8450 char *p = (char *)buf;
8451 u16 tune = simple_strtoul(p, &p, 0);
8452 u8 phymode = (tune >> 8) & 0xff;
8453 u16 channel = tune & 0xff;
8454
8455 IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8456
8457 mutex_lock(&priv->mutex);
8458 if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8459 (priv->phymode != phymode)) {
8460 const struct iwl_channel_info *ch_info;
8461
8462 ch_info = iwl_get_channel_info(priv, phymode, channel);
8463 if (!ch_info) {
8464 IWL_WARNING("Requested invalid phymode/channel "
8465 "combination: %d %d\n", phymode, channel);
8466 mutex_unlock(&priv->mutex);
8467 return -EINVAL;
8468 }
8469
8470 /* Cancel any currently running scans... */
8471 if (iwl_scan_cancel_timeout(priv, 100))
8472 IWL_WARNING("Could not cancel scan.\n");
8473 else {
8474 IWL_DEBUG_INFO("Committing phymode and "
8475 "rxon.channel = %d %d\n",
8476 phymode, channel);
8477
8478 iwl_set_rxon_channel(priv, phymode, channel);
8479 iwl_set_flags_for_phymode(priv, phymode);
8480
8481 iwl_set_rate(priv);
8482 iwl_commit_rxon(priv);
8483 }
8484 }
8485 mutex_unlock(&priv->mutex);
8486
8487 return count;
8488 }
8489
8490 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8491
8492 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8493
8494 static ssize_t show_measurement(struct device *d,
8495 struct device_attribute *attr, char *buf)
8496 {
8497 struct iwl_priv *priv = dev_get_drvdata(d);
8498 struct iwl_spectrum_notification measure_report;
8499 u32 size = sizeof(measure_report), len = 0, ofs = 0;
8500 u8 *data = (u8 *) & measure_report;
8501 unsigned long flags;
8502
8503 spin_lock_irqsave(&priv->lock, flags);
8504 if (!(priv->measurement_status & MEASUREMENT_READY)) {
8505 spin_unlock_irqrestore(&priv->lock, flags);
8506 return 0;
8507 }
8508 memcpy(&measure_report, &priv->measure_report, size);
8509 priv->measurement_status = 0;
8510 spin_unlock_irqrestore(&priv->lock, flags);
8511
8512 while (size && (PAGE_SIZE - len)) {
8513 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8514 PAGE_SIZE - len, 1);
8515 len = strlen(buf);
8516 if (PAGE_SIZE - len)
8517 buf[len++] = '\n';
8518
8519 ofs += 16;
8520 size -= min(size, 16U);
8521 }
8522
8523 return len;
8524 }
8525
8526 static ssize_t store_measurement(struct device *d,
8527 struct device_attribute *attr,
8528 const char *buf, size_t count)
8529 {
8530 struct iwl_priv *priv = dev_get_drvdata(d);
8531 struct ieee80211_measurement_params params = {
8532 .channel = le16_to_cpu(priv->active_rxon.channel),
8533 .start_time = cpu_to_le64(priv->last_tsf),
8534 .duration = cpu_to_le16(1),
8535 };
8536 u8 type = IWL_MEASURE_BASIC;
8537 u8 buffer[32];
8538 u8 channel;
8539
8540 if (count) {
8541 char *p = buffer;
8542 strncpy(buffer, buf, min(sizeof(buffer), count));
8543 channel = simple_strtoul(p, NULL, 0);
8544 if (channel)
8545 params.channel = channel;
8546
8547 p = buffer;
8548 while (*p && *p != ' ')
8549 p++;
8550 if (*p)
8551 type = simple_strtoul(p + 1, NULL, 0);
8552 }
8553
8554 IWL_DEBUG_INFO("Invoking measurement of type %d on "
8555 "channel %d (for '%s')\n", type, params.channel, buf);
8556 iwl_get_measurement(priv, &params, type);
8557
8558 return count;
8559 }
8560
8561 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8562 show_measurement, store_measurement);
8563 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
8564
8565 static ssize_t store_retry_rate(struct device *d,
8566 struct device_attribute *attr,
8567 const char *buf, size_t count)
8568 {
8569 struct iwl_priv *priv = dev_get_drvdata(d);
8570
8571 priv->retry_rate = simple_strtoul(buf, NULL, 0);
8572 if (priv->retry_rate <= 0)
8573 priv->retry_rate = 1;
8574
8575 return count;
8576 }
8577
8578 static ssize_t show_retry_rate(struct device *d,
8579 struct device_attribute *attr, char *buf)
8580 {
8581 struct iwl_priv *priv = dev_get_drvdata(d);
8582 return sprintf(buf, "%d", priv->retry_rate);
8583 }
8584
8585 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8586 store_retry_rate);
8587
8588 static ssize_t store_power_level(struct device *d,
8589 struct device_attribute *attr,
8590 const char *buf, size_t count)
8591 {
8592 struct iwl_priv *priv = dev_get_drvdata(d);
8593 int rc;
8594 int mode;
8595
8596 mode = simple_strtoul(buf, NULL, 0);
8597 mutex_lock(&priv->mutex);
8598
8599 if (!iwl_is_ready(priv)) {
8600 rc = -EAGAIN;
8601 goto out;
8602 }
8603
8604 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8605 mode = IWL_POWER_AC;
8606 else
8607 mode |= IWL_POWER_ENABLED;
8608
8609 if (mode != priv->power_mode) {
8610 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8611 if (rc) {
8612 IWL_DEBUG_MAC80211("failed setting power mode.\n");
8613 goto out;
8614 }
8615 priv->power_mode = mode;
8616 }
8617
8618 rc = count;
8619
8620 out:
8621 mutex_unlock(&priv->mutex);
8622 return rc;
8623 }
8624
8625 #define MAX_WX_STRING 80
8626
8627 /* Values are in microsecond */
8628 static const s32 timeout_duration[] = {
8629 350000,
8630 250000,
8631 75000,
8632 37000,
8633 25000,
8634 };
8635 static const s32 period_duration[] = {
8636 400000,
8637 700000,
8638 1000000,
8639 1000000,
8640 1000000
8641 };
8642
8643 static ssize_t show_power_level(struct device *d,
8644 struct device_attribute *attr, char *buf)
8645 {
8646 struct iwl_priv *priv = dev_get_drvdata(d);
8647 int level = IWL_POWER_LEVEL(priv->power_mode);
8648 char *p = buf;
8649
8650 p += sprintf(p, "%d ", level);
8651 switch (level) {
8652 case IWL_POWER_MODE_CAM:
8653 case IWL_POWER_AC:
8654 p += sprintf(p, "(AC)");
8655 break;
8656 case IWL_POWER_BATTERY:
8657 p += sprintf(p, "(BATTERY)");
8658 break;
8659 default:
8660 p += sprintf(p,
8661 "(Timeout %dms, Period %dms)",
8662 timeout_duration[level - 1] / 1000,
8663 period_duration[level - 1] / 1000);
8664 }
8665
8666 if (!(priv->power_mode & IWL_POWER_ENABLED))
8667 p += sprintf(p, " OFF\n");
8668 else
8669 p += sprintf(p, " \n");
8670
8671 return (p - buf + 1);
8672
8673 }
8674
8675 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8676 store_power_level);
8677
8678 static ssize_t show_channels(struct device *d,
8679 struct device_attribute *attr, char *buf)
8680 {
8681 struct iwl_priv *priv = dev_get_drvdata(d);
8682 int len = 0, i;
8683 struct ieee80211_channel *channels = NULL;
8684 const struct ieee80211_hw_mode *hw_mode = NULL;
8685 int count = 0;
8686
8687 if (!iwl_is_ready(priv))
8688 return -EAGAIN;
8689
8690 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8691 if (!hw_mode)
8692 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8693 if (hw_mode) {
8694 channels = hw_mode->channels;
8695 count = hw_mode->num_channels;
8696 }
8697
8698 len +=
8699 sprintf(&buf[len],
8700 "Displaying %d channels in 2.4GHz band "
8701 "(802.11bg):\n", count);
8702
8703 for (i = 0; i < count; i++)
8704 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8705 channels[i].chan,
8706 channels[i].power_level,
8707 channels[i].
8708 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8709 " (IEEE 802.11h required)" : "",
8710 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8711 || (channels[i].
8712 flag &
8713 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8714 ", IBSS",
8715 channels[i].
8716 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8717 "active/passive" : "passive only");
8718
8719 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8720 if (hw_mode) {
8721 channels = hw_mode->channels;
8722 count = hw_mode->num_channels;
8723 } else {
8724 channels = NULL;
8725 count = 0;
8726 }
8727
8728 len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8729 "(802.11a):\n", count);
8730
8731 for (i = 0; i < count; i++)
8732 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8733 channels[i].chan,
8734 channels[i].power_level,
8735 channels[i].
8736 flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8737 " (IEEE 802.11h required)" : "",
8738 (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8739 || (channels[i].
8740 flag &
8741 IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8742 ", IBSS",
8743 channels[i].
8744 flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8745 "active/passive" : "passive only");
8746
8747 return len;
8748 }
8749
8750 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8751
8752 static ssize_t show_statistics(struct device *d,
8753 struct device_attribute *attr, char *buf)
8754 {
8755 struct iwl_priv *priv = dev_get_drvdata(d);
8756 u32 size = sizeof(struct iwl_notif_statistics);
8757 u32 len = 0, ofs = 0;
8758 u8 *data = (u8 *) & priv->statistics;
8759 int rc = 0;
8760
8761 if (!iwl_is_alive(priv))
8762 return -EAGAIN;
8763
8764 mutex_lock(&priv->mutex);
8765 rc = iwl_send_statistics_request(priv);
8766 mutex_unlock(&priv->mutex);
8767
8768 if (rc) {
8769 len = sprintf(buf,
8770 "Error sending statistics request: 0x%08X\n", rc);
8771 return len;
8772 }
8773
8774 while (size && (PAGE_SIZE - len)) {
8775 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8776 PAGE_SIZE - len, 1);
8777 len = strlen(buf);
8778 if (PAGE_SIZE - len)
8779 buf[len++] = '\n';
8780
8781 ofs += 16;
8782 size -= min(size, 16U);
8783 }
8784
8785 return len;
8786 }
8787
8788 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8789
8790 static ssize_t show_antenna(struct device *d,
8791 struct device_attribute *attr, char *buf)
8792 {
8793 struct iwl_priv *priv = dev_get_drvdata(d);
8794
8795 if (!iwl_is_alive(priv))
8796 return -EAGAIN;
8797
8798 return sprintf(buf, "%d\n", priv->antenna);
8799 }
8800
8801 static ssize_t store_antenna(struct device *d,
8802 struct device_attribute *attr,
8803 const char *buf, size_t count)
8804 {
8805 int ant;
8806 struct iwl_priv *priv = dev_get_drvdata(d);
8807
8808 if (count == 0)
8809 return 0;
8810
8811 if (sscanf(buf, "%1i", &ant) != 1) {
8812 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8813 return count;
8814 }
8815
8816 if ((ant >= 0) && (ant <= 2)) {
8817 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8818 priv->antenna = (enum iwl_antenna)ant;
8819 } else
8820 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8821
8822
8823 return count;
8824 }
8825
8826 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8827
8828 static ssize_t show_status(struct device *d,
8829 struct device_attribute *attr, char *buf)
8830 {
8831 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8832 if (!iwl_is_alive(priv))
8833 return -EAGAIN;
8834 return sprintf(buf, "0x%08x\n", (int)priv->status);
8835 }
8836
8837 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8838
8839 static ssize_t dump_error_log(struct device *d,
8840 struct device_attribute *attr,
8841 const char *buf, size_t count)
8842 {
8843 char *p = (char *)buf;
8844
8845 if (p[0] == '1')
8846 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8847
8848 return strnlen(buf, count);
8849 }
8850
8851 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8852
8853 static ssize_t dump_event_log(struct device *d,
8854 struct device_attribute *attr,
8855 const char *buf, size_t count)
8856 {
8857 char *p = (char *)buf;
8858
8859 if (p[0] == '1')
8860 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8861
8862 return strnlen(buf, count);
8863 }
8864
8865 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8866
8867 /*****************************************************************************
8868 *
8869 * driver setup and teardown
8870 *
8871 *****************************************************************************/
8872
8873 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8874 {
8875 priv->workqueue = create_workqueue(DRV_NAME);
8876
8877 init_waitqueue_head(&priv->wait_command_queue);
8878
8879 INIT_WORK(&priv->up, iwl_bg_up);
8880 INIT_WORK(&priv->restart, iwl_bg_restart);
8881 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8882 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8883 INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8884 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8885 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8886 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8887 INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8888 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8889 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8890 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8891
8892 iwl_hw_setup_deferred_work(priv);
8893
8894 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8895 iwl_irq_tasklet, (unsigned long)priv);
8896 }
8897
8898 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8899 {
8900 iwl_hw_cancel_deferred_work(priv);
8901
8902 cancel_delayed_work_sync(&priv->init_alive_start);
8903 cancel_delayed_work(&priv->scan_check);
8904 cancel_delayed_work(&priv->alive_start);
8905 cancel_delayed_work(&priv->post_associate);
8906 cancel_work_sync(&priv->beacon_update);
8907 }
8908
8909 static struct attribute *iwl_sysfs_entries[] = {
8910 &dev_attr_antenna.attr,
8911 &dev_attr_channels.attr,
8912 &dev_attr_dump_errors.attr,
8913 &dev_attr_dump_events.attr,
8914 &dev_attr_flags.attr,
8915 &dev_attr_filter_flags.attr,
8916 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8917 &dev_attr_measurement.attr,
8918 #endif
8919 &dev_attr_power_level.attr,
8920 &dev_attr_retry_rate.attr,
8921 &dev_attr_rf_kill.attr,
8922 &dev_attr_rs_window.attr,
8923 &dev_attr_statistics.attr,
8924 &dev_attr_status.attr,
8925 &dev_attr_temperature.attr,
8926 &dev_attr_tune.attr,
8927 &dev_attr_tx_power.attr,
8928
8929 NULL
8930 };
8931
8932 static struct attribute_group iwl_attribute_group = {
8933 .name = NULL, /* put in device directory */
8934 .attrs = iwl_sysfs_entries,
8935 };
8936
8937 static struct ieee80211_ops iwl_hw_ops = {
8938 .tx = iwl_mac_tx,
8939 .start = iwl_mac_start,
8940 .stop = iwl_mac_stop,
8941 .add_interface = iwl_mac_add_interface,
8942 .remove_interface = iwl_mac_remove_interface,
8943 .config = iwl_mac_config,
8944 .config_interface = iwl_mac_config_interface,
8945 .configure_filter = iwl_configure_filter,
8946 .set_key = iwl_mac_set_key,
8947 .get_stats = iwl_mac_get_stats,
8948 .get_tx_stats = iwl_mac_get_tx_stats,
8949 .conf_tx = iwl_mac_conf_tx,
8950 .get_tsf = iwl_mac_get_tsf,
8951 .reset_tsf = iwl_mac_reset_tsf,
8952 .beacon_update = iwl_mac_beacon_update,
8953 .erp_ie_changed = iwl_mac_erp_ie_changed,
8954 #ifdef CONFIG_IWLWIFI_HT
8955 .conf_ht = iwl_mac_conf_ht,
8956 .get_ht_capab = iwl_mac_get_ht_capab,
8957 #ifdef CONFIG_IWLWIFI_HT_AGG
8958 .ht_tx_agg_start = iwl_mac_ht_tx_agg_start,
8959 .ht_tx_agg_stop = iwl_mac_ht_tx_agg_stop,
8960 .ht_rx_agg_start = iwl_mac_ht_rx_agg_start,
8961 .ht_rx_agg_stop = iwl_mac_ht_rx_agg_stop,
8962 #endif /* CONFIG_IWLWIFI_HT_AGG */
8963 #endif /* CONFIG_IWLWIFI_HT */
8964 .hw_scan = iwl_mac_hw_scan
8965 };
8966
8967 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8968 {
8969 int err = 0;
8970 struct iwl_priv *priv;
8971 struct ieee80211_hw *hw;
8972 int i;
8973
8974 if (iwl_param_disable_hw_scan) {
8975 IWL_DEBUG_INFO("Disabling hw_scan\n");
8976 iwl_hw_ops.hw_scan = NULL;
8977 }
8978
8979 if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8980 (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8981 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8982 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8983 err = -EINVAL;
8984 goto out;
8985 }
8986
8987 /* mac80211 allocates memory for this device instance, including
8988 * space for this driver's private structure */
8989 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8990 if (hw == NULL) {
8991 IWL_ERROR("Can not allocate network device\n");
8992 err = -ENOMEM;
8993 goto out;
8994 }
8995 SET_IEEE80211_DEV(hw, &pdev->dev);
8996
8997 hw->rate_control_algorithm = "iwl-4965-rs";
8998
8999 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
9000 priv = hw->priv;
9001 priv->hw = hw;
9002
9003 priv->pci_dev = pdev;
9004 priv->antenna = (enum iwl_antenna)iwl_param_antenna;
9005 #ifdef CONFIG_IWLWIFI_DEBUG
9006 iwl_debug_level = iwl_param_debug;
9007 atomic_set(&priv->restrict_refcnt, 0);
9008 #endif
9009 priv->retry_rate = 1;
9010
9011 priv->ibss_beacon = NULL;
9012
9013 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
9014 * the range of signal quality values that we'll provide.
9015 * Negative values for level/noise indicate that we'll provide dBm.
9016 * For WE, at least, non-0 values here *enable* display of values
9017 * in app (iwconfig). */
9018 hw->max_rssi = -20; /* signal level, negative indicates dBm */
9019 hw->max_noise = -20; /* noise level, negative indicates dBm */
9020 hw->max_signal = 100; /* link quality indication (%) */
9021
9022 /* Tell mac80211 our Tx characteristics */
9023 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
9024
9025 hw->queues = 4;
9026 #ifdef CONFIG_IWLWIFI_HT
9027 #ifdef CONFIG_IWLWIFI_HT_AGG
9028 hw->queues = 16;
9029 #endif /* CONFIG_IWLWIFI_HT_AGG */
9030 #endif /* CONFIG_IWLWIFI_HT */
9031
9032 spin_lock_init(&priv->lock);
9033 spin_lock_init(&priv->power_data.lock);
9034 spin_lock_init(&priv->sta_lock);
9035 spin_lock_init(&priv->hcmd_lock);
9036 spin_lock_init(&priv->lq_mngr.lock);
9037
9038 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
9039 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
9040
9041 INIT_LIST_HEAD(&priv->free_frames);
9042
9043 mutex_init(&priv->mutex);
9044 if (pci_enable_device(pdev)) {
9045 err = -ENODEV;
9046 goto out_ieee80211_free_hw;
9047 }
9048
9049 pci_set_master(pdev);
9050
9051 iwl_clear_stations_table(priv);
9052
9053 priv->data_retry_limit = -1;
9054 priv->ieee_channels = NULL;
9055 priv->ieee_rates = NULL;
9056 priv->phymode = -1;
9057
9058 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
9059 if (!err)
9060 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
9061 if (err) {
9062 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
9063 goto out_pci_disable_device;
9064 }
9065
9066 pci_set_drvdata(pdev, priv);
9067 err = pci_request_regions(pdev, DRV_NAME);
9068 if (err)
9069 goto out_pci_disable_device;
9070 /* We disable the RETRY_TIMEOUT register (0x41) to keep
9071 * PCI Tx retries from interfering with C3 CPU state */
9072 pci_write_config_byte(pdev, 0x41, 0x00);
9073 priv->hw_base = pci_iomap(pdev, 0, 0);
9074 if (!priv->hw_base) {
9075 err = -ENODEV;
9076 goto out_pci_release_regions;
9077 }
9078
9079 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
9080 (unsigned long long) pci_resource_len(pdev, 0));
9081 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9082
9083 /* Initialize module parameter values here */
9084
9085 if (iwl_param_disable) {
9086 set_bit(STATUS_RF_KILL_SW, &priv->status);
9087 IWL_DEBUG_INFO("Radio disabled.\n");
9088 }
9089
9090 priv->iw_mode = IEEE80211_IF_TYPE_STA;
9091
9092 priv->ps_mode = 0;
9093 priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9094 priv->is_ht_enabled = 1;
9095 priv->channel_width = IWL_CHANNEL_WIDTH_40MHZ;
9096 priv->valid_antenna = 0x7; /* assume all 3 connected */
9097 priv->ps_mode = IWL_MIMO_PS_NONE;
9098 priv->cck_power_index_compensation = iwl_read32(
9099 priv, CSR_HW_REV_WA_REG);
9100
9101 iwl4965_set_rxon_chain(priv);
9102
9103 printk(KERN_INFO DRV_NAME
9104 ": Detected Intel Wireless WiFi Link 4965AGN\n");
9105
9106 /* Device-specific setup */
9107 if (iwl_hw_set_hw_setting(priv)) {
9108 IWL_ERROR("failed to set hw settings\n");
9109 mutex_unlock(&priv->mutex);
9110 goto out_iounmap;
9111 }
9112
9113 #ifdef CONFIG_IWLWIFI_QOS
9114 if (iwl_param_qos_enable)
9115 priv->qos_data.qos_enable = 1;
9116
9117 iwl_reset_qos(priv);
9118
9119 priv->qos_data.qos_active = 0;
9120 priv->qos_data.qos_cap.val = 0;
9121 #endif /* CONFIG_IWLWIFI_QOS */
9122
9123 iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9124 iwl_setup_deferred_work(priv);
9125 iwl_setup_rx_handlers(priv);
9126
9127 priv->rates_mask = IWL_RATES_MASK;
9128 /* If power management is turned on, default to AC mode */
9129 priv->power_mode = IWL_POWER_AC;
9130 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9131
9132 pci_enable_msi(pdev);
9133
9134 err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
9135 if (err) {
9136 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
9137 goto out_disable_msi;
9138 }
9139
9140 mutex_lock(&priv->mutex);
9141
9142 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
9143 if (err) {
9144 IWL_ERROR("failed to create sysfs device attributes\n");
9145 mutex_unlock(&priv->mutex);
9146 goto out_release_irq;
9147 }
9148
9149 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
9150 * ucode filename and max sizes are card-specific. */
9151 err = iwl_read_ucode(priv);
9152 if (err) {
9153 IWL_ERROR("Could not read microcode: %d\n", err);
9154 mutex_unlock(&priv->mutex);
9155 goto out_pci_alloc;
9156 }
9157
9158 mutex_unlock(&priv->mutex);
9159
9160 IWL_DEBUG_INFO("Queueing UP work.\n");
9161
9162 queue_work(priv->workqueue, &priv->up);
9163
9164 return 0;
9165
9166 out_pci_alloc:
9167 iwl_dealloc_ucode_pci(priv);
9168
9169 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9170
9171 out_release_irq:
9172 free_irq(pdev->irq, priv);
9173
9174 out_disable_msi:
9175 pci_disable_msi(pdev);
9176 destroy_workqueue(priv->workqueue);
9177 priv->workqueue = NULL;
9178 iwl_unset_hw_setting(priv);
9179
9180 out_iounmap:
9181 pci_iounmap(pdev, priv->hw_base);
9182 out_pci_release_regions:
9183 pci_release_regions(pdev);
9184 out_pci_disable_device:
9185 pci_disable_device(pdev);
9186 pci_set_drvdata(pdev, NULL);
9187 out_ieee80211_free_hw:
9188 ieee80211_free_hw(priv->hw);
9189 out:
9190 return err;
9191 }
9192
9193 static void iwl_pci_remove(struct pci_dev *pdev)
9194 {
9195 struct iwl_priv *priv = pci_get_drvdata(pdev);
9196 struct list_head *p, *q;
9197 int i;
9198
9199 if (!priv)
9200 return;
9201
9202 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9203
9204 set_bit(STATUS_EXIT_PENDING, &priv->status);
9205
9206 iwl_down(priv);
9207
9208 /* Free MAC hash list for ADHOC */
9209 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9210 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9211 list_del(p);
9212 kfree(list_entry(p, struct iwl_ibss_seq, list));
9213 }
9214 }
9215
9216 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9217
9218 iwl_dealloc_ucode_pci(priv);
9219
9220 if (priv->rxq.bd)
9221 iwl_rx_queue_free(priv, &priv->rxq);
9222 iwl_hw_txq_ctx_free(priv);
9223
9224 iwl_unset_hw_setting(priv);
9225 iwl_clear_stations_table(priv);
9226
9227 if (priv->mac80211_registered) {
9228 ieee80211_unregister_hw(priv->hw);
9229 iwl_rate_control_unregister(priv->hw);
9230 }
9231
9232 /*netif_stop_queue(dev); */
9233 flush_workqueue(priv->workqueue);
9234
9235 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
9236 * priv->workqueue... so we can't take down the workqueue
9237 * until now... */
9238 destroy_workqueue(priv->workqueue);
9239 priv->workqueue = NULL;
9240
9241 free_irq(pdev->irq, priv);
9242 pci_disable_msi(pdev);
9243 pci_iounmap(pdev, priv->hw_base);
9244 pci_release_regions(pdev);
9245 pci_disable_device(pdev);
9246 pci_set_drvdata(pdev, NULL);
9247
9248 kfree(priv->channel_info);
9249
9250 kfree(priv->ieee_channels);
9251 kfree(priv->ieee_rates);
9252
9253 if (priv->ibss_beacon)
9254 dev_kfree_skb(priv->ibss_beacon);
9255
9256 ieee80211_free_hw(priv->hw);
9257 }
9258
9259 #ifdef CONFIG_PM
9260
9261 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9262 {
9263 struct iwl_priv *priv = pci_get_drvdata(pdev);
9264
9265 set_bit(STATUS_IN_SUSPEND, &priv->status);
9266
9267 /* Take down the device; powers it off, etc. */
9268 iwl_down(priv);
9269
9270 if (priv->mac80211_registered)
9271 ieee80211_stop_queues(priv->hw);
9272
9273 pci_save_state(pdev);
9274 pci_disable_device(pdev);
9275 pci_set_power_state(pdev, PCI_D3hot);
9276
9277 return 0;
9278 }
9279
9280 static void iwl_resume(struct iwl_priv *priv)
9281 {
9282 unsigned long flags;
9283
9284 /* The following it a temporary work around due to the
9285 * suspend / resume not fully initializing the NIC correctly.
9286 * Without all of the following, resume will not attempt to take
9287 * down the NIC (it shouldn't really need to) and will just try
9288 * and bring the NIC back up. However that fails during the
9289 * ucode verification process. This then causes iwl_down to be
9290 * called *after* iwl_hw_nic_init() has succeeded -- which
9291 * then lets the next init sequence succeed. So, we've
9292 * replicated all of that NIC init code here... */
9293
9294 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9295
9296 iwl_hw_nic_init(priv);
9297
9298 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9299 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
9300 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
9301 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9302 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9303 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9304
9305 /* tell the device to stop sending interrupts */
9306 iwl_disable_interrupts(priv);
9307
9308 spin_lock_irqsave(&priv->lock, flags);
9309 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
9310
9311 if (!iwl_grab_restricted_access(priv)) {
9312 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
9313 APMG_CLK_VAL_DMA_CLK_RQT);
9314 iwl_release_restricted_access(priv);
9315 }
9316 spin_unlock_irqrestore(&priv->lock, flags);
9317
9318 udelay(5);
9319
9320 iwl_hw_nic_reset(priv);
9321
9322 /* Bring the device back up */
9323 clear_bit(STATUS_IN_SUSPEND, &priv->status);
9324 queue_work(priv->workqueue, &priv->up);
9325 }
9326
9327 static int iwl_pci_resume(struct pci_dev *pdev)
9328 {
9329 struct iwl_priv *priv = pci_get_drvdata(pdev);
9330 int err;
9331
9332 printk(KERN_INFO "Coming out of suspend...\n");
9333
9334 pci_set_power_state(pdev, PCI_D0);
9335 err = pci_enable_device(pdev);
9336 pci_restore_state(pdev);
9337
9338 /*
9339 * Suspend/Resume resets the PCI configuration space, so we have to
9340 * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
9341 * from interfering with C3 CPU state. pci_restore_state won't help
9342 * here since it only restores the first 64 bytes pci config header.
9343 */
9344 pci_write_config_byte(pdev, 0x41, 0x00);
9345
9346 iwl_resume(priv);
9347
9348 return 0;
9349 }
9350
9351 #endif /* CONFIG_PM */
9352
9353 /*****************************************************************************
9354 *
9355 * driver and module entry point
9356 *
9357 *****************************************************************************/
9358
9359 static struct pci_driver iwl_driver = {
9360 .name = DRV_NAME,
9361 .id_table = iwl_hw_card_ids,
9362 .probe = iwl_pci_probe,
9363 .remove = __devexit_p(iwl_pci_remove),
9364 #ifdef CONFIG_PM
9365 .suspend = iwl_pci_suspend,
9366 .resume = iwl_pci_resume,
9367 #endif
9368 };
9369
9370 static int __init iwl_init(void)
9371 {
9372
9373 int ret;
9374 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9375 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9376 ret = pci_register_driver(&iwl_driver);
9377 if (ret) {
9378 IWL_ERROR("Unable to initialize PCI module\n");
9379 return ret;
9380 }
9381 #ifdef CONFIG_IWLWIFI_DEBUG
9382 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
9383 if (ret) {
9384 IWL_ERROR("Unable to create driver sysfs file\n");
9385 pci_unregister_driver(&iwl_driver);
9386 return ret;
9387 }
9388 #endif
9389
9390 return ret;
9391 }
9392
9393 static void __exit iwl_exit(void)
9394 {
9395 #ifdef CONFIG_IWLWIFI_DEBUG
9396 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
9397 #endif
9398 pci_unregister_driver(&iwl_driver);
9399 }
9400
9401 module_param_named(antenna, iwl_param_antenna, int, 0444);
9402 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9403 module_param_named(disable, iwl_param_disable, int, 0444);
9404 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9405 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
9406 MODULE_PARM_DESC(hwcrypto,
9407 "using hardware crypto engine (default 0 [software])\n");
9408 module_param_named(debug, iwl_param_debug, int, 0444);
9409 MODULE_PARM_DESC(debug, "debug output mask");
9410 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
9411 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9412
9413 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
9414 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9415
9416 /* QoS */
9417 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
9418 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9419
9420 module_exit(iwl_exit);
9421 module_init(iwl_init);
Linux kernel - Deliverables
This page took 0.273289 seconds and 6 git commands to generate.